Using null hypothesis,
a. Hzero : μ = 22
Hone : μ > 22
b. All requirements are satisfied.
c. Reject Hzero
d. There is sufficient evidence to support the claim that the students who complete the core curriculum are ready for college-level mathematics. (Score above 22 on average).
What is null hypothesis?The null hypothesis is used to make decisions when employing data and statistical tests. The null hypothesis, or Hzero, claims that there is no difference in the characteristics of the two samples. A null hypothesis is, in general, a statement of no difference. The null hypothesis must be rejected in order to accept the alternative hypothesis.
a. Given,
μzero = 22.
n = 200
x = 22.6
s = 3.9
α = 0.05
Claim is mean is more than 22.
The claim is either null or alternative hypothesis. The null hypothesis states that the population mean is equal to the value mentioned in the claim. If the null hypothesis is the claim, then the alternative hypothesis states the opposite of the null hypothesis.
Hzero : μ = 22
Hone : μ > 22
b. Requirements t-distribution hypothesis test: Simple random sample, sampling distribution of the sample mean is approximately normal & independent sample results.
Simple random sample: Satisfied, because exercise prompt states that the sample is a random sample.
All requirements are satisfied.
c. Classical approach:
Determine the value of test statistics,
t = 2.176
Determine the critical values from the students' T-distribution table with
df = n - 1 = 200 -1 = 199 > 100
t = 1.660
2.176>1.660
⇒ Reject Hzero
d. There is sufficient evidence to support the claim that the students who complete the core curriculum are ready for college-level mathematics. (Score above 22 on average).
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As the Earth revolves around the sun, it travels at a speed of approximately 18 miles per second. Convert this speed to kilometers per second. At this speed, how many kilometers will the Earth travel in 10 seconds? In your computations, assume that 1 mile is equal to 1.6 kilometers. Do not round your answers.
Answer:
[tex]\frac{28.5km}{sec}[/tex]
In 10 seconds the earth will travel 288 km
Step-by-step explanation:
[tex]\frac{18miles}{sec}[/tex] x [tex]\frac{1.6km}{1 mile}[/tex] = [tex]\frac{28.8km}{sec}[/tex]
[tex]\frac{28.8km}{sec}[/tex] x [tex]\frac{10sec}{1}[/tex] = 288 km
Helping in the name of Jesus.
Which system of equations can you use to find the roots of the equation? x3 – 10x = x2 – 6 y = x3 – x2 + 10x + 6 y = 0 y = x3 – x2 + 10x y = 6 y = x3 – 10x y = x2 – 6.
From least to greatest, What are the x–coordinates of the three points where the graphs of the equations intersect? If approximate, enter values to the hundredths. , ,
Answer:
429
Step-by-step explanation:
How many cups of water will you need for 8
cups of flour?
Answer:
Step-by-step explanation:
2 cups of water.
Resuelva por medio de la función y = mx + b con los siguientes datos:
I. m =3 y b =7 ➔ f(x) = ¿?
Answer:
which of the following set of nos could not be the length of sides of aright angled triangles.
What is the best estimate of 2/3, 1, 0
The estimated value of 2/3 is roughly 0.67, of 1 it is 1 and for 0 it is 0.
What does a estimate mean?
A number given to a demographic parameter that was taken from the a statistical sample. A pricing estimate for the job that needs to be done. 3. an assessment or view of the essence, character, or trait of an object or a person.
What is an illustration of an estimate?
To make computations simpler, an estimate is an approximate estimation of the real value, amount, or quantity.
For 2/3, on dividing we get the value as 0.67.
Since 1 is a number and doesn't need to be rounded or approximated, the guess is 1.
Since it is a number without a fractional component, the approximation of 0 also is 0.
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The expression (x−2)+x+(x+3) represents the combined hours a salesperson works on Monday, Wednesday, and Friday, respectively. Which statement is true? The salesperson works 2 hours less on Monday than Wednesday and works 3 hours less on Wednesday than Friday. The salesperson works 2 hours less on Monday than Wednesday and works 3 hours less on Wednesday than Friday. The salesperson works 2 hours less on Monday than Friday and works 3 hours less on Wednesday than Friday. The salesperson works 2 hours less on Monday than Friday and works 3 hours less on Wednesday than Friday. The salesperson works 3 hours more on Monday than Wednesday and works 2 hours less on Wednesday than Friday. The salesperson works 3 hours more on Monday than Wednesday and works 2 hours less on Wednesday than Friday. The salesperson works 3 hours more on Monday than Friday and works 2 hours less on Wednesday than Friday.
The salesperson works 2 hours less on Monday than Wednesday and works 3 hours less on Wednesday than Friday
Identifying the relationship between the daysGiven that
Combined hours = x - 2 + x + x - 3
When splitted, we have
Monday = x - 2
Wednesday = x
Friday = x + 3
To determine which statement is true, we need to compare the hours worked on Monday and Wednesday, and the hours worked on Wednesday and Friday.
By comparison, Option 1 is correct
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What THREE statements are correct with the variation in the random samples?
A-Samples 1, 2, and 4 best represent the data set because the data in these sets have similar results.
B-Sample 5 may not be an accurate sample for hamburgers and other because of the difference in numbers compared to other samples.
C-Samples 1, 2, and 4 best represent the data set because there are different results when comparing these samples.
D-Sample 2 may not be an accurate sample for pizza and hot dogs because of the difference in numbers compared to other samples.
E-Sample 3 may not be an accurate sample for pizza and hot dogs because of the difference in numbers compared to other samples.
A, B, and E are the consistent with the random samples on preferred school lunches by 100 students.
What is a random sample?A random sample is a subset of a larger population that is selected in such a way that each member of the population has an equal chance of being included in the sample. Random sampling is an important tool in statistics and allows researchers to make inferences about the larger population based on the characteristics of the sample.
Random sampling helps to ensure that the sample is representative of the population and that any statistical analysis done on the sample can be generalized to the larger population.
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PLEASE HELP ASAP!!! THANK YOU
Answer:
360 in^2
Step-by-step explanation:
Area of bottom rectangle : A = 7.5 x 17 = 127.5
Area of front rectangle: A = 6 x 17 = 102
Area of back rectangle: A = 4.5 x 17 = 76.5
Area of 2 triangles: 2(4.5 x 6) = 54
Total surface area = 127.5 + 102 + 76.5 + 54 = 360 in^2
Consider one triangle whose sides measure units, units, and 2 units. Consider another triangle whose sides measure 2 units, units, and units. Are these triangles congruent, similar, or both? Explain your answer.
The triangles are cοngruent.
How to find if two triangles are congruent?Tο determine whether the twο triangles are cοngruent, similar, οr bοth, we need tο cοmpare their cοrrespοnding sides and angles.
Let's first cοmpare their cοrrespοnding sides:
Triangle 1: sides measure x, x, and 2 units
Triangle 2: sides measure 2 units, x, and x
The sides x and x are the same in bοth triangles, and the side 2 units in triangle 1 cοrrespοnd tο the side 2 units in triangle 2. Hοwever, the οrder οf the sides is different in the twο triangles. We can reοrder the sides in triangle 2 sο that they match the οrder οf the sides in triangle 1:
Triangle 2: sides measure x, x, and 2 units
Nοw we can see that the twο triangles have the same side lengths and are therefοre cοngruent.
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3.5 cm
6 cm
3.5 cm that is my question I don’t understand it’s something. With pyramids
Based on the information provided, the volume of the pyramid would be 5308.33 cubic centimeters.
How to calculate the volume of a pyramid?The volume or the space occupied by the pyramid can be calculated using the following formula
V=(1/3)Ah
In this formula, A is the area of the base and h is the height.
Area of the base: 6.5 x 3.5 = 22.75 squared centimeters.
Now, let's calculate the volume:
V = (1/3)*22.75 x 700 cm = 5308.33 cm^3 (Cubic centimeters)
Here 1 meter = 100 cm, then 7 m = 700 cm
Note: This question is incomplete; here is the missing information:
The base of a pyramid is 6.5 cm by 3.5cm and its height is 7m. What is its volume?
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Suppose you know that ∠S and ∠Y are complementary, and that m∠S = 4(m∠Y) − 135°. Find m∠Y.
Answer:The value of angle y is 40°.
Complementary angles are the angles that have their sum equal to 90°.
Therefore, based on the information given, the value of angle y will be calculated thus:
x + y = 90°.
4y - 110° + y = 90°
Collect like terms
4y + y = 90° + 110°
5y = 200°
y = 200/5
y = 40°
The value of angle y is 40°.
Step-by-step explanation:
50 hombres tienen provisiones para 20 días a razón de tres raciones diarias. Sí las
raciones se disminuyen en 1/3 y se aumentan 10 hombres ¿Cuántos días durarán
los víveres?
Answer:
Para resolver este problema, primero debemos encontrar la cantidad total de raciones que tienen los 50 hombres para 20 días a razón de tres raciones diarias:
50 hombres x 3 raciones por día x 20 días = 3000 raciones
Esto significa que tienen un total de 3000 raciones de alimentos para los 50 hombres durante 20 días.
Luego, podemos calcular la cantidad de raciones diarias después de la disminución en 1/3:
3 raciones diarias - (1/3)(3 raciones diarias) = 2 raciones diarias
Esto significa que cada hombre ahora recibe 2 raciones diarias en lugar de 3.
Después de aumentar el número de hombres en 10, tenemos un total de 60 hombres:
50 hombres + 10 hombres = 60 hombres
Podemos calcular la cantidad total de raciones diarias para los 60 hombres durante los días que durarán las provisiones:
60 hombres x 2 raciones por día = 120 raciones diarias
Finalmente, podemos calcular la cantidad de días que durarán los víveres:
3000 raciones totales / 120 raciones diarias = 25 días
Por lo tanto, los víveres durarán 25 días después de disminuir las raciones en 1/3 y aumentar el número de hombres en 10.
Step-by-step explanation:
unit 10 hw 4 can yall pls help me
Answer:33
Step-by-step explanation:
33
Which of these relations is a function?
➤
Video
Answer:
Step-by-step explanation:
Only the one on the bottom right is a function. It's the only one that does not have 2 of the same x value for a single y value.
Write an equation in slope intercept form given m = 2 and the point (0,-5)
Answer:
y = 2x - 5
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
given m = 2 and point where line crosses y- axis (0, - 5 ) , then c = - 5
y = 2x - 5 ← equation of line
What is the sum of 1h20, 2h40, 3h05?
Answer:
6h65
Step-by-step explanation:
Add up all the values:
1h+2h+3h= 6
20+40+05= 65
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The area of a square is 196 square feet. Find the length of a side.
FIND THE LENGTH IN FEET!!
The graph of an exponential function is shown in the figure below.
The horizontal asymptote is shown as a dashed line.
Find the domain and the range.
Write your answers as inequalities, using x or y as appropriate.
Or, you may instead click on "Empty set" or "All reals" as the answer.
The range of this function is: (0, 2].
Which examples of exponential functions are there?f(x) = bx, where b is a positive integer between 0 and 1, denotes an exponential function. Like in every exponential expression, B and x are referred to as the base and exponent, respectively. An excellent illustration of an exponential function is bacterial proliferation. Some microorganisms reproduce every hour.
As all real numbers are the domain of an exponential function, the following is the domain of this function:
(-∞, ∞)
We must examine the function's behaviour as x gets closer to positive and negative infinity in order to determine the range. The function approaches the horizontal asymptote at y = 2 as x increases to positive infinity. The function gets close to 0, but never quite achieves it as x increases to negative infinity. The scope of this function is as follows:
(0, 2].
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I have enough money to buy 4 exercise books at 120 naira each. how many pencils costing 80 naira each can I buy for the same amount
Answer:
6 pencils
Step-by-step explanation:
120*4=480, 480/80=6
Use the diagram to find the measure of the given angle m
After calculating the straight angle we know that ∠BAC is (A) 150°.
What is the straight angle?
A straight angle in geometry is one that is 180 degrees in length.
It looks like a straight line, which is why it is known as a straight angle.
In other words, it is an angle whose sides are in the same straight line but opposite to the vertex.
A straight angle in geometry is an angle with a vertex point that is at 180 degrees.
In other words, an angle becomes a straight angle when its arms point in the opposite direction.
So, we know that s straight angle is always 180°.
∠BAD is a straight angle.
We can also observe that:
∠BAD = ∠BAC + ∠CAD
Now, solve as follows:
∠BAD = ∠BAC + ∠CAD
180 = ∠BAC + 50
180 - 50 = ∠BAC
130° = ∠BAC
Therefore, after calculating the straight angle we know that ∠BAC is (A) 150°.
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What is the outcome and sample space of getting a sum of 9 when three dice are rolled
The outcome of getting a sum of 9 when three dice are rolled is that the sum of the three numbers shown on the dice must add up to 9. The sample space for this scenario can be written as S = { (1,3,5), (2,3,4), (2,4,3), (3,2,4), (3,4,2), (4,2,3), (4,3,2), (5,1,3)}
What is outcome?Outcome refers to the result of an action or event. It is the end result of the process and can be positive, negative, or a mix of both. Outcome can also refer to the impact of an event, such as the effect it has on the environment, the people affected, or the economy.
The sample space for this scenario is the set of all possible combinations of three dice that add up to 9.
Each of the elements in this set represents a combination of numbers on the dice that will add up to 9 when rolled. For example, the first element of this set (1,3,5) means that if the three dice are rolled, the numbers shown on the dice will be 1, 3, and 5, and the sum of the numbers will be 9.
When determining the sample space for the outcome of rolling three dice, the order of the numbers does not matter. Therefore, the sets (2,3,4) and (4,2,3) are equivalent, since the sum of the numbers is still 9 regardless of the order.
In conclusion, the outcome of getting a sum of 9 when three dice are rolled is that the sum of the three numbers shown on the dice must add up to 9. The sample space for this scenario is the set of all possible combinations of three dice that add up to 9.
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At the start of the month, the counter on the copy machine reads 6,583. At the end of the moth, it reads 82,110. The copies cost 1 1/3 cents a piece. What was the approximate total cost of the copies for this month?
Answer:
$1007.03
Step-by-step explanation:
You want the cost of copies for the month at 1 1/3 cents each if the copy counter ran from 6583 to 82110 during the month.
Number of copiesThe number of copies made is the difference in counter readings:
82110 -6583 = 75,527 . . . . . copies made
CostEach costs 1 1/3 = 4/3 cents, so the cost of these copies is ...
(75,527 copies) × (4/3 cents/copy) = 100702 2/3 cents ≈ 100703 cents
There are 100 cents in a dollar (or other currency unit), so the cost is about ...
(100703¢)/(100¢/$) = $1007.03
The total cost of copies for the month is about $1007.03.
__
Additional comment
The currency unit is not specified in this problem. There are a number of world currencies in which the smallest denomination is 1 cent. The US dollar, the Euro, and the Aruban Guilder are some of them.
Use set-builder notation to indicate set numbers as described.
Answer
{x||
The set of all real numbers between 5 and 9, including 5
The set of all real numbers between 5 and 9, including 5, can be represented by the set-builder notation {x ∈ ℝ | 5 ≤ x ≤ 9}.
What is set-builder notation, and how is it used in mathematics?A compact, mathematical notation is used to represent a set of components using set-builder notation. In set-builder notation, we express the attributes or features that the components of the set must have in order to be included in the set. The standard format for set-builder notation is x | P(x), where x is a variable that denotes the set's elements and P(x) is a predicate or condition that lists the characteristics each member must possess in order to be included in the set.
We can represent the set of all real numbers as:
{x ∈ ℝ | 5 ≤ x ≤ 9}
This notation reads "the set of all x in the real numbers such that x is between 5 and 9, including 5."
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5. Jennifer bought 14.75 gallons of gasoline for her car at a cost of $2.95 a gallon. Which is closest to the amount she paid for the gasoline? Responses
A. less than $35.00
B. between $35.00 and $40.00
C. between $40.00 and $45.00
D. more than $45.00
sk A pond in the shape of a right-angled triangle is shown below. Calculate the perimeter of the pond. Give your answer in metres to 1 d.p. 2.42 m.
The perimeter of the pond from the calculation is 5.42 meter
How to solve for the perimeter of the pondWe would first have to find the sides using the angle that we have here
b / 2.42 = sin 74
cross multiply
2.42 x sin 74 = 2.33 meters
h / 2.42 = cos 74
2.42 x cos 74 = 0.67 meters
Given that the sides of the triangle are 2.33 , 2.42 and 0.67 meters
The perimeter would be solved by 2.33 + 2.42 + 0.67
= 5.42 meters
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the factor of 70
the common factor of 70
[tex]the factor of 70[/tex]
The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70.
What is a factor?
A factor is a number that completely divides another number. In other words, if multiplying two whole numbers results in the creation of a product, the numbers we are multiplying are factors of the product because the product is divisible by them.
Multiplication and division are the two techniques for determining factors. Rules of divisibility can also be applied.
The given number is 70.
70 is completely divisible is 1.
70 is completely divisible is 2.
70 is completely divisible is 5.
70 is completely divisible is 7.
70 is completely divisible is 10.
70 is completely divisible is 14.
70 is completely divisible is 35.
70 is completely divisible is 70.
The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70.
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Find [ f.g](-4) for f(x) = x - 8 and g(x)=-x^2 +2
Answer: Buckle up this answer is gonna be a rollercoaster and here we go.
To find f.g, we first need to evaluate g(-4) and then use the result as the input for f(x).
We have:
g(-4) = -(-4)^2 + 2 = -16 + 2 = -14
Now, we use this result as the input for f(x):
f(g(-4)) = f(-14) = -14 - 8 = -22
Therefore, f.g = -22.
What a short ride.
find (-21 ) + (13 ) + 20
Answer:
the correct answer is 12
Answer:
12
Step-by-step explanation:
Consider the following figure.
(Note that the figure is not drawn to scale.)
46°
72°
53°
L
57°
K
Order the side lengths IJ, JL, IK, JK, and LK from least to greatest.
O
The order of the side lengths of the triangles from the least to the greatest is Lk < JL < IJ < JK < IK.
How does angle opposite to a side of triangle affect its size?
If the angle facing a side of a triangle increases, then the length of the opposite side may also increase. This is because the larger the angle, the more vertical the opposite side becomes, and therefore the longer it may become.
Conversely, if the angle facing a side of a triangle decreases, then the length of the opposite side may also decrease. This is because the smaller the angle, the less vertical the opposite side becomes, and therefore the shorter it may become.
From the given diagram, the largest side of the triangle will be the side directly opposite the largest angle.
Also, the smallest side of the triangle will be the side directly opposite the smallest angle.
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15. What is the name of an account managed by a third party who makes
payments according to a set of instructions, often used for insurance and tax
payments for a mortgage?