The P-value is 0.003, so he must reject the null hypothesis.
What is the correct P-value and conclusion?To determine the correct answer, we need to perform a statistical hypothesis test.
The null hypothesis is that the mean difference between pretest scores and posttest scores (μd) is equal to 0. The alternative hypothesis is that the mean difference is greater than 0.
To perform this hypothesis test, we can use a paired-sample t-test, since we have two sets of scores from the same students. The formula for the t-statistic is: t = (Md - μd) / (sd / sqrt(n))
Using the data from the table, we can calculate the mean difference, standard deviation, and t-statistic as follows:
Mean difference (Md) = 84.33 - 81.33 = 3
Standard deviation (sd) = 2.622
t-statistic = (3 - 0) / (2.622 / sqrt(18)) = 3.13
To find the p-value, we need to look up the t-distribution with 17 degrees of freedom (since we have 18 paired observations) and a one-tailed test (since the alternative hypothesis is one-tailed). At a significance level of 0.01 and 17 degrees of freedom, the critical t-value is 2.567.
The p-value is the probability of getting a t-statistic as extreme or more extreme than the observed t-statistic, assuming the null hypothesis is true. From the t-distribution table, we can see that the p-value corresponding to a t-statistic of 3.13 with 17 degrees of freedom is approximately 0.003.
Since the p-value is less than the significance level of 0.01, we can reject the null hypothesis and conclude that there is sufficient evidence to suggest that the mean difference between pretest scores and posttest scores is greater than 0, indicating that the students have mastered the material in their statistics unit.
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what is the probability that the mean annual salary of a random sample of 64 teachers from this state is less than $52,000?
The probability that the mean annual salary of a random sample of 64 teachers from state X is less than $52,000 is approximately 0.005 or 0.5%.
The sampling distribution of the mean is normally distributed with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.
Here, we are given that the population mean is $54,000 and the population standard deviation is $5,000. We are also told that the sample size is n = 64.
To find the probability that the mean annual salary of a random sample of 64 teachers is less than $52,000, we need to standardize the sample mean using the sampling distribution of the mean.
Z = (x' - μ) / (σ / √n)
where x' is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.
Substituting the given values, we get:
Z = (52,000 - 54,000) / (5,000 / √64)
= -2.56
We can then look up the probability of a standard normal variable being less than -2.56 using a standard normal table or calculator, which gives us a probability of approximately 0.005.
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Complete question is:
The annual salary of teachers in a certain state X has a mean of $54,000 and standard deviation of σ = $5,000. What is the probability that the mean annual salary of a random sample of 64 teachers from this state is less than $52,000?
the scores of the top quartile of students in a math class were 95, 86, 87, 91, 94, and 87 on the last test. what is the average score of these top students?
90 is the average score of these top students.
What is the average in mathematics?
Mean is defined as the average equal to the ratio of the total number of values in a particular set to the total number of values in the set.
The average in mathematics is the average of a data set obtained by adding all the numbers and dividing the sum of the numbers by the number of numbers. For example, using the following dataset:
8, 9, 5, 6, 7, 8 + 9 + 5 + 6 + 7 = 35, 35/5 = 7, so the average is 7.
the average score of these top students = 95 + 86 + 87 + 91 + 94 + 87/6
= 540/6 = 90
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solve these please.. thank you...
For the given circle the value of x = [tex]18^{0}[/tex] and the value of y = [tex]10^{0}[/tex] .
What about circle?
A circle is a two-dimensional geometric shape that consists of all the points in a plane that are equidistant from a fixed point called the center. The distance from the center to any point on the circle is called the radius of the circle. The diameter of a circle is the distance across the circle passing through the center, which is equal to twice the radius.
The circumference of a circle is the distance around the outside edge of the circle and is given by the formula C = 2πr, where "r" is the radius of the circle, and "π" (pi) is a mathematical constant equal to approximately 3.14159. The area of a circle is given by the formula A = πr^2, where "r" is the radius.
The circle is a fundamental shape in geometry and is used in many areas of mathematics, science, and engineering. It has many properties that make it useful, such as being able to inscribe it in a square with equal sides, as well as being the shape that minimizes the perimeter for a given area.
According to the given information:
As, we know that when diameter passes through center of circle is form a right angle .
So,
[tex]5x^{0} = 90^{0} \\\\x^{0} = 18^{0}[/tex]
In the same way as we know that sum of all angle of triangle is = [tex]180^{0}[/tex]
i.e.
[tex]5x^{0} + 50^{0} + 4y^{0} = 180^{0}\\\\90^{0} + 50^{0} + 4y^{0} = 180^{0} \\\\4y^{0} = 180^{0} - 90^{0} - 50^{0} \\\\y^{0} = 10^{0}[/tex]
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Area of Triangle::
8m
Area of Rectangle (without missing triangle):;
Area of shaded region:
The area of the rectangle is 104 m², area of the triangle is 15 m², and area of the shaded region is equal to 74 m².
How to evaluate for the shaded regionThe shaded region is the remaining area in the rectangle which is outside the triangle, so it is derived by subtracting the area of the triangle from the area of the rectangle as follows:
area of the rectangle = 13 m × 8 m
area of the rectangle = 104 m²
area of the triangle = 1/2 × 5 m × 6 m
area of the triangle = 15 m²
area of the shaded region = 104 m² - 15 m²
area of the shaded region = 89 m²
Therefore, the area of the rectangle is 104 m², area of the triangle is 15 m², and area of the shaded region is equal to 74 m².
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For which equations is 8 a solution? Select the four correct answers. x + 6 = 2 x + 2 = 10 x minus 4 = 4 x minus 2 = 10 2 x = 4 3 x = 24 StartFraction x Over 2 EndFraction = 16 StartFraction x Over 8 EndFraction = 1
The equations for which 8 is a solution are: x - 4 = 4, 2x = 16, x/2 = 16, and x/8 = 1.
What is equation?An equation is a mathematical statement that shows that two expressions are equal to each other. It typically consists of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. The goal is usually to solve for the value of the variable that makes the equation true.
In the given question,
The equations in which 8 is a solution are:
x - 4 = 8 (which simplifies to x = 12)
2x = 16 (which simplifies to x = 8)
x/2 = 16 (which simplifies to x = 32)
x/8 = 1 (which simplifies to x = 8)
Therefore, the correct answers are:
x - 4 = 8
2x = 16
x/2 = 16
x/8 = 1.
The equations for which 8 is a solution are: x - 4 = 4, 2x = 16, x/2 = 16, and x/8 = 1.
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x² - 16x + 64 = 0 is the equation whose solution is 8.
How to check for which equations is 8 a solution?
To check if 8 is a solution for each equation, we substitute x = 8 into each equation and see if the equation is true or not.
x + 6 = 8 + 6 = 14
and
2x + 2 = 2(8) + 2 = 18, which is not equal to the value of (x+6).
Therefore, 8 is not a solution to this equation.
4x - 4 = 4(8) - 4 = 28,
and
10 - 2x = 10 - 2(8) = -6, which is not equal to 28.
Therefore, 8 is not a solution to this equation.
2x - 4 = 2×8-4 = 12
and
3x-24 = 3×8-24 = 0 which is not equal to 12. Therefore, 8 is not a solution to this equation.
Now,
x² - 16x + 64 = 0 (which can be factored as (x-8)² = 0)
x = 8 (which is always true)
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Correct question is "For which equations is 8 a solution? Select the correct answers from the following,
1) x + 6 = 2 x + 2
2) 10 - 2x = 4 x - 4
3) 2 x-4 = 3 x - 24
4) x² - 16x + 64 = 0
Alfonso said that the perimeter of this
triangle is 66 centimeters. What was his error?
Required error is the perimeter of the triangle is 60 cm, not 66 cm as Alfonso said.
What is perimeter of a triangle?
The perimeter of a triangle is the total length of the three sides of the triangle. It is a fundamental geometric concept that is important in many applications, including architecture, engineering, and construction.
To calculate the perimeter of a triangle, you simply add up the lengths of its three sides. This is expressed by the following formula,
Perimeter = side a + side b + side c
where "a," "b," and "c" are the lengths of the three sides of the triangle.
Here Alfonso's error is that he added the three side lengths incorrectly. The correct way to find the perimeter of a triangle is to add up all three sides.
In this case, the three side lengths are 22 cm, 11 cm, and 27 cm. Adding them up, we get,
22 cm + 11 cm + 27 cm = 60 cm
Therefore, the perimeter of the triangle is 60 cm, not 66 cm as Alfonso said.
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Correct question is " There is a triangle whose sides are 22 cm, 11 cm and 27 cm.
Alfonso said that the perimeter of this
triangle is 66 centimeters. What was his error?"
what will increase the width of a confidence interval? increase confidence level. b) increase number in sample c) decrease confidence level. d) decrease variance
Increasing the width of a confidence interval can be achieved by:
a) Increasing the confidence level: A higher confidence level requires a wider interval to capture the true population parameter with greater certainty.
b) Decreasing the number in the sample: A smaller sample size results in less precision and a wider confidence interval due to increased sampling variability.
c) Increasing the variance: A larger variance implies greater dispersion in the data, which requires a wider confidence interval to accommodate the increased uncertainty.
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Increasing the confidence level or decreasing the sample size would increase the width of a confidence interval. c
Conversely, decreasing the confidence level or increasing the sample size would decrease the width of the confidence interval.
Decreasing the variance of the data would also decrease the width of the confidence interval.
As it would make the data points more tightly clustered around the mean, reducing the uncertainty of the estimate.
On the other hand, a smaller confidence level or a larger sample size would result in a narrower confidence interval.
The breadth of the confidence interval would be reduced if the data's volatility was reduced.
The data points would become more closely packed around the mean, lowering the estimate's level of uncertainty.
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The table shows the results for spinning the spinner 50 times. What is the relative frequency for the event "spin a 1"?
Outcome. | 1 | 2| 3 |4
Frequency|16| 16|16|2
Number of trials
50
The relative frequency for the event "spin a 1" is
The relative frequency of spinning a 1 is 0.32 or 32%.
The given table shows the results of spinning a spinner 50 times. The outcomes of the spins are listed in the first column, and the frequencies are listed in the second column. To find the relative frequency of spinning a 1, we need to divide the frequency of spinning a 1 by the total number of trials (50).
According to the table, the frequency of spinning a 1 is 16. Therefore, the relative frequency of spinning a 1 can be calculated as follows:
Relative frequency of spinning a 1 = (frequency of spinning a 1) / (total number of trials)
Relative frequency of spinning a 1 = 16 / 50
Relative frequency of spinning a 1 = 0.32 or 32%
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A large pizza at a Pizza Palace costs $11.50 plus $0.90 per topping. The cost for a Large pizza at Tasty Pizza costs $13.25 $0.55 per topping. Let n represent the number of toppings. Let c represent the total cost for the pizza.
a) Write a system of equations to model this scenario
b) then solve the system (using the SUBSTITUTION method) to find the number of toppings where the cost is the same. Be sure to **show all work**
Answer:
Step-by-step explanation:
a) The system of equations modeling this scenario is as follows:
C = 11.50 + 0.9n
C = 13.25 + 0.55n.
b) The number of toppings where the cost is the same at either Pizza Palace or Tasty Pizza is 5.
What is a system of equations?
A system of equations is two or more equations solved concurrently.
A system of equations is also called simultaneous equations because the equations are solved at the same time or simultaneously.
Pizza Palace Tasty Pizza
Pizza cost per unit $11.50 $13.25
Topping cost per unit $0.90 $0.55
Let the number of toppings = n
Let the total cost for the pizza at each pizza place = c
Equations:
The total cost at Pizza Palace C = 11.50 + 0.9n... Equation 1
The total cost at Tasty Pizza, C = 13.25 + 0.55n... Equation 2
For the total cost, c, to be the same at the pizza places, Equation 1 must equate Equation 2:
That is, C = C.
Substituting the values of C:
11.50 + 0.9n = 13.25 + 0.55n
0.35n = 1.75
n = 5
the variance is equal to the . a. squared value of the standard deviation b. inverse value of the standard deviation c. absolute value of the standard deviation d. square root of the standard deviation
The variance is equal to the squared value of the standard deviation.(Option a)
The variance is a measure of how spread out a set of data is. It is calculated by taking the average of the squared differences of each data point from the mean. The standard deviation, on the other hand, is the square root of the variance and measures the spread of data in relation to the mean.
Therefore, the variance is equal to the squared value of the standard deviation. Mathematically, Var(X) = σ^2, where Var(X) is the variance and σ is the standard deviation.
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Someone help me please!
Answer:
A: the scale is missing
i hope this helps
Step-by-step explanation:
Answer:
the numbers are supposed to start at zero and the scale is missing
The speed limit along the old Geelong road is 80 km/h. How far would you travel in 2. 5 hour?
You would travel 200 kilometers in 2.5 hours along the Old Geelong Road if you drove at the speed limit of 80 km/h.
If the speed limit along the Old Geelong Road is 80 km/h, it means that you are not allowed to drive faster than 80 km per hour on this road. To find the distance you would travel in 2.5 hours, you need to know how far you can travel in one hour at this speed.
Since the speed limit is 80 km/h, you can travel 80 kilometers in one hour. Therefore, in 2.5 hours, you would travel:
Distance = Speed × Time
Distance = 80 km/h × 2.5 h
Distance = 200 km
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In mathematics What is 35% of 10.l
Answer:
3.535
Step-by-step explanation:
35% is the same as .35
therefore, you can multiply 10.1 by .35 to get 3.535
a production manager at a wall clock company wants to test their new wall clocks. the designer claims they have a mean life of 14 years with a variance of 16 . if the claim is true, in a sample of 40 wall clocks, what is the probability that the mean clock life would be less than 13.6 years? round your answer to four decimal places.
The probability that the mean clock life would be less than 13.6 years in a sample of 40 wall clocks is 0.1337
The probability that the mean clock life would be less than 13.6 years in a sample of 40 wall clocks can be calculated using the t-distribution since the population variance is unknown. The formula for t-distribution is:
t = (x-bar - μ) / (s / √n)
where x-bar is the sample mean, μ is the hypothesized population mean (14 years), s is the sample standard deviation (the square root of the sample variance), and n is the sample size (40).
Using the given variance, we can calculate the sample standard deviation as √16 = 4. Plugging in the values, we get:
t = (13.6 - 14) / (4 / √40) = -1.118
Using a t-distribution table with degrees of freedom (df) = n - 1 = 39, we find that the probability of getting a t-value less than -1.118 is 0.1337. Therefore, the probability that the mean clock life would be less than 13.6 years in a sample of 40 wall clocks is 0.1337 (rounded to four decimal places).
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assume that the class has 50 students and that the examination period is 90 minutes in length. how many students do you expect will be unable to complete the exam in the allotted time? (round your answer up to the nearest integer.) students
The number of students that would be expected to be unable to complete the exam in the allotted time is 8 students.
To find the number of students who would be unable to complete the exam in the allotted time, we need to calculate the number of students who take more than 90 minutes to complete the exam.
First, we calculate the z-score for the cutoff point of 90 minutes:
z = (90 - 80) / 10 = 1
Using a standard normal distribution table, we find that the probability of a student taking more than 90 minutes is approximately 0.1587.
Therefore, the expected number of students who would be unable to complete the exam in the allotted time is:
0.1587 x 50 = 7.935
Rounding up to the nearest integer, we can expect 8 students to be unable to complete the exam in the allotted time.
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The complete question is :
If a class of 50 students has an examination period of 90 minutes, and the average time a student takes to complete the exam is 80 minutes with a standard deviation of 10 minutes, how many students would be expected to be unable to complete the exam in the allotted time?
WILL MATK AS BRAINLEIST!!
Question in picture!
The area of the region is 6 square unit.
Here is how to arrive at the area of the regionThe base of the triangle is the distance between the x-coordinates where the curves y = √x and y = −x + 6 intersect, which is 2. The height of the triangle is the distance between the y-coordinate where y = 0 intersects the y-axis and the y-coordinate where the line y = −x + 6 intersects the y-axis. This distance is 6.
Therefore, the area of the region bounded by the curves y = √x, y = −x + 6, and y = 0 is:
Area = 1/2 * base * height
= 1/2 * 2 * 6
= 6
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in exercises 59-62, find the component form of the sum of u and v with direction angles
The component form of the sum of u and v with direction angles is u + v = (10√2 - 50)i + 10√2 j.
We are given the magnitudes and direction angles of vectors u and v. We need to find the component form of their sum.
Let's first convert the given magnitudes and direction angles to their corresponding components. For vector u:
|u| = 20, θu = 45°
The x-component of u is given by:
ux = |u| cos(θu) = 20 cos(45°) = 10√2
The y-component of u is given by:
uy = |u| sin(θu) = 20 sin(45°) = 10√2
Therefore, the component form of vector u is:
u = 10√2 i + 10√2 j
Similarly, for vector v:
|v| = 50, θv = 180°
The x-component of v is given by:
vx = |v| cos(θv) = -50 cos(180°) = -50
The y-component of v is given by:
vy = |v| sin(θv) = 50 sin(180°) = 0
Therefore, the component form of vector v is:
v = -50 i + 0 j
The component form of the sum of u and v is given by the sum of their x- and y-components:
u + v = (10√2 - 50) i + (10√2 + 0) j
Simplifying, we get:
u + v = (10√2 - 50) i + 10√2 j
Therefore, the component form of the sum of u and v is:
u + v = (10√2 - 50) i + 10√2 j
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The question is -
Find the component form of the sum of u and v with the given magnitudes and direction angles θu and θv.
| | u | | = 20 , θu = 45° | | v | | = 50 , θv = 180°.
Can someone help with this fast!?!!
The total cost b(x), in dollars, for renting a bowling lane for x hours is shown: b(x) = 3x + 15. What does b(3) represent?
A. The number of dollars it costs to rent the bowling lane for 3 hours.
B. The number of games you can bowl for a cost of $3.
C. The number of hours the bowling lane can be rented for a cost of $3.
D. The number of games you can bowl in 3 hours.
As a result, the response is A .The number of dollars it costs to rent the bowling lane for 3 hours.
Define dollar?The US, Canada, Australia, and some nations in the Pacific, Caribbean, Southeast Asia, Africa, and South America all use the dollar as their primary unit of exchange It is a type of paper money, currency, and monetary unit used in the United States that is equivalent to 100 cents
The total cost (in dollars) for renting a bowling alley for x hours is represented by the function b(x) = 3x + 15.
We change x in the function to 3 to obtain b(3).
B(3) = 3(3) + 15 = 9 + 15 = 24 is the result.
Therefore, b(3) is the amount of money required to rent the bowling alley for three hours.
As a result, the response is A.
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An equation is shown:
0.35v+0.40v+1.2+0.05v=7.12
What is the value of v?
To solve for x, we can combine like terms on the left side of the equation:
0.35x + 0.40x + 0.05x + 1.2 = 7.12
0.8x + 1.2 = 7.12
Subtracting 1.2 from both sides:
0.8x = 5.92
Dividing both sides by 0.8, we get:
x = 7.4
Therefore, the value of x is actually 7.4
The area of the small triangle is_______
The area of the medium triangle is______
The area of the large triangle is______
The area of the small triangle is 4 sq.cm.. The area of the medium triangle is 12 sq.cm. The area of the large triangle is 24 sq. cm.
Explain about the triangle:With three sides, three angles, and three vertices, a triangle is a closed, two-dimensional object. A polygon also includes a triangle.
A triangle's internal angles are always added together to equal 1800.Any two triangle sides added together will always have a length larger than the third side.Half of a product of a triangle's base and height makes up its surface area.Given data:
Dimensions-
small triangle: base = 2 cm, height = 4cmmedium triangle: base = 4 cm , height = 6 cmLarger triangle: base = 6 cm ,height = 8 cmarea of triangle = 1/2 *base * height
The area of the small triangle = 1/2*2*4 = 4 sq.cm.
The area of the medium triangle = 1/2*4*6 = 12 sq.cm.
The area of the large triangle = 1/2*6*8 = 24 sq. cm
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Complete question:
Dimensions-
small triangle: base = 2 cm, height = 4cm
medium triangle: base = 4 cm , height = 6 cm
Larger triangle: base = 6 cm ,height = 8 cm
The area of the small triangle is_______
The area of the medium triangle is______
The area of the large triangle is______
Assignment
Active
Identifying and Describing Population Change
Organism
Number
per
square
meter
(1991)
Number
per
square
meter
(1994)
Number
per
square
meter
(1997)
Unionid mussels are native to the Hudson River in New
York State. In the early 1990s, zebra mussels were
introduced into the Hudson River. The table shows the
number of unionid mussels and zebra mussels over the
course of six years.
How did the population of unionid mussels change
after zebra mussels were introduced? Why did this
change occur?
Unionid
mussels
8
3
2
I
Zebra
mussels
4
1,329
3,181
The population of unionid mussels start decreasing approximately at the rate of 75% after zebra mussels were introduced .
The change occurs as zebra mussels consuming almost all the resources available into the Hudson River.
Change in the population of the unionid mussels and zebra mussels over the course of six years are as follow,
population of unionid mussels in 1991 in number per square meter
= 8
Then in the year 1994 it become 3 number per square meter
And finally in the year 1994 it become 2 number per square meter
Change in population of unionid mussels from 1991 to 1997
= [( 2 - 8 )/ 8] × 100
= -75%
Negative sign indicate that decrease in the population.
Now ,
Change in population of zebra mussels is given by,
In 1991 in number per square meter = 4
In 1994 in number per square meter = 1,329
In 1997 in number per square meter = 3,181
Change in population of zebra mussels from 1991 to 1997
= [( 3181 - 4 )/ 4] × 100
= 79425%
There is increase in the population of zebra mussels in thousands.
Reason of change is zebra mussels introduced into the Hudson River
and they eating almost all the resources available in the area.
Zebra mussels consumes large amount of phytoplankton and other small organisms available in the water .
Due to lack of resource availability unionid mussels population decreasing year by year.
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The above question is incomplete, the complete question is:
Unionid mussels are native to the Hudson River in New
York State. In the early 1990s, zebra mussels were
introduced into the Hudson River. The table shows the
number of unionid mussels and zebra mussels over the
course of six years.
How did the population of unionid mussels change
after zebra mussels were introduced? Why did this
change occur?
attached data.
The Johnson family lives 432 miles from the beach. They drive 52% of the distance before stopping for lunch. About how many miles do they drive before lunch? Explain how you can use mental math to find the answer.
Help with algebra 2 homework
The estimated radius of the circular object with an area of 40 cm² is 3.57 cm
Writing the inverse function r(A) and estimating the radius of a circular objectTo find the inverse function r(A), we can start by setting A = πr² and solving for r:
A = πr²
A/π = r²
r = √(A/π)
Therefore, the inverse function is r(A) = √(A/π).
To estimate the radius of a circular object with an area of 40 cm², we can simply substitute A = 40 cm² into the inverse function:
r(40) = √(40/π) ≈ 3.57 cm
Therefore, the estimated radius of the circular object with an area of 40 cm² is approximately 3.57 cm
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What is the area of this figure?
Answer:
Step-by-step explanation:
first you divide the shape into 3 parts ;a big triangle, and 2 little squares
after that to get the height of the triangle i gotten by adding
3+5+2+6=16yd
area of a triangle =1/2 × b×h
area =1/2×7×16
area=112/2
area=56yd²
small squre 1=
area=5×5
=25yd²
area of small rectangle=
area=LB
=3×2
=6yd²
total area =triangle+square+rectangle
=56+25+6
TA=87yd²
in a random sample of 100 audited estate tax returns, it was determined that the mean amount of additional tax owed was
We can be 90% confident that the true mean additional tax owed in the population of audited estate tax returns falls between $3044.92 and $3875.08.
To construct a 90% confidence interval for the mean additional tax owed in a random sample of 100 audited estate tax returns, we need to use a t-distribution because the population standard deviation is not known. The formula for the confidence interval is:
CI = x' ± t*(s/√n)
Where x' is the sample mean, s is the sample standard deviation, n is the sample size, and t is the t-value from the t-distribution with (n-1) degrees of freedom and a 90% confidence level.
The t-value for a 90% confidence level with 99 degrees of freedom (n-1=100-1=99) is 1.660.
Substituting the values given in the problem, we get:
CI = 3460 ± 1.660*(2520/√100)
CI = 3460 ± 415.08
CI = (3044.92, 3875.08)
This means that if we were to repeat this sampling process many times, 90% of the time the true mean would be captured by the confidence interval.
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Complete question is:
In a random sample of 100 audited estate tax returns, it was determined that the mean amount of additional tax owed was $3460 with a standard deviation of $2520
Construct and interpret a 90% confidence interval for the mean additional.
a sequence is ---select--- sequence when the first differences are all the same nonzero number.
A sequence is arithmetic sequence when the first differences are all the same non-zero number.
An arithmetic sequence is a set of integers where each term is created by multiplying the preceding term by a defined number. The common difference of the series, which is a constant value, is the same for all following pairs of terms.
As a result, a sequence can be said to be arithmetic if its first differences all contain the same non-zero value. For instance, the arithmetic sequence 3, 6, 9, 12, 15,... has a common difference of 3.
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need answer by 11:45am
The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.
Which drive-thru typically has more wait time, and why?
Burger Quick, because it has a larger median
Burger Quick, because it has a larger mean
Super Fast Food, because it has a larger median
Super Fast Food, because it has a larger mean
The drive-thru with typically more wait time is Burger Quick, because it has a larger median. The Option A.
Why does Burger Quick have a larger median for wait time?The median is a measure of central tendency that represents the middle value of a set of data. In this case, the median wait time at Burger Quick is 15.5 minutes, while the median wait time at Super Fast Food is 12 minutes.
This indicates that, on average, customers at Burger Quick experience a longer wait time compared to customers at Super Fast Food. The larger median at Burger Quick suggests that there may be some longer wait times skewing the data towards the higher end which could be due to various factors such as slower service, or other operational issues at Burger Quick resulting in a longer wait time for customers at their drive-thru.
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The sum of first two angles is 120 degree and that of last two angles is 130 degree. Find all the angles in degrees.
The four angles are: A = 110 degrees, B = 10 degrees, C = 120 degrees, D = 120 degrees
What are angles ?Angles are geometric shapes created when two lines, rays, or line segments cross at a single point.
The two lines or line segments that make up the angle are referred to as the sides or arms of the angle, and this shared point is known as the vertex of the angle.
The amount of rotation required to shift one side to overlap with the opposite side determines the magnitude of an angle.
Angles are commonly expressed in degrees, with 360 degrees representing a full rotation around a point.
Acute angles (less than 90 degrees),
right angles (exactly 90 degrees),
obtuse angles (more than 90 degrees but less than 180 degrees), and straight angles (exactly 180 degrees) are some frequent forms of angles.
What are degrees ?
Angles are measured in degrees, a unit of measurement. 1/360th of a full revolution around a point is equivalent to one degree (1°).
Two perpendicular lines can be used to create a right angle, which has a 90 degree angle.
A straight angle, created by a straight line, has a degree value of 180.
Angles, rotations, and slopes are frequently measured in degrees in the fields of mathematics, physics, engineering, and several others.
The freezing point of water is 0 degrees Celsius (or 32 degrees Fahrenheit), whereas the boiling point is 100 degrees Celsius. In daily life, degrees are frequently used to express temperatures. (or 212 degrees Fahrenheit).
According to question :-
Let the four angles be A, B, C, and D. We know that:
A + B + C + D = 360 (the sum of all angles in a quadrilateral is 360 degrees)
We also know that:
A + B = 120 (the sum of the first two angles is 120 degrees)
C + D = 130 (the sum of the last two angles is 130 degrees)
We can use these equations to solve for the individual angles. First, we can rearrange the equation A + B = 120 to get:
A = 120 - B
Similarly, we can rearrange the equation C + D = 130 to get:
D = 130 - C
Substituting these expressions for A and D in terms of B and C into the equation A + B + C + D = 360, we get:
(120 - B) + B + C + (130 - C) = 360
Simplifying, we get:
250 - B + C = 360
Subtracting 250 from both sides, we get:
C - B = 110
Now we have two equations with two unknowns:
C + B = 130 (from the equation C + D = 130)
C - B = 110
We can add these equations to eliminate B and get:
2C = 240
Dividing by 2, we get:
C = 120
Substituting this value for C into either of the equations above, we get:
B = 10
Now we can use the equation A + B = 120 to find A:
A + 10 = 120
A = 110
Finally, we can use the equation A + B + C + D = 360 to find D:
110 + 10 + 120 + D = 360
D = 120
Therefore, the four angles are:
A = 110 degrees
B = 10 degrees
C = 120 degrees
D = 120 degrees
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keziah stands outside a grocery store on the west side of her town and surveys exiting shoppers about their preference in frozen desserts. what type of sampling technique does keziah's survey represent?
The sample may not be representative of the population's preferences for frozen desserts.
Sampling technique that Keziah is using is convenience sampling. Convenience sampling is a non-probability sampling technique.
The researcher selects the easiest and most convenient individuals to participate in the study.
Keziah is simply surveying shoppers who are exiting a grocery store on the west side of her town without any predetermined criteria for selection.
As a result, the sample may not be representative of the population's preferences for frozen desserts.
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Katrine’s baby brother weighed 8 pounds and 3 ounces on the day he was born. He gained 5 ounces each week for 12 weeks. How much did Katrine’s baby brother weigh, in ounces, at the end of 12 weeks?”
Answer:
191 ounces at the end of 12 weeks
Step-by-step explanation: