please help me! i need help :/

To compare variance of math test scores between two students, null hypothesis is that variances are equal and alternative hypothesis is that variance of first student's grades is higher.

Calculate F-statistic and p-value to reject or fail to reject null hypothesis at 5% significance level. If null hypothesis is rejected and p-value is less than 0.05, conclude that variance of first student's grades is higher.

a) H0: σ1 = σ2

b) Ha: σ1 > σ2

c) The F-statistic would be calculated by taking the ratio of the variance of the first student's grades (σ1²) to the variance of the second student's grades (σ2²).

d) The p-value is the probability of obtaining a result as extreme as the one observed, given that the null hypothesis is true. To determine the p-value, you would need to perform a statistical test such as an F-test or Levine's test.

e) At the 5% significance level, you would reject the null hypothesis if the p-value is less than 0.05. If the p-value is greater than 0.05, you would fail to reject the null hypothesis.

f) There is enough evidence to say that the variance of the grades for the first student is higher than the variance in the grades for the second student if the p-value is less than 0.05 and the null hypothesis is rejected. If the p-value is greater than 0.05 or the null hypothesis is not rejected, then there is not enough evidence to make this conclusion.

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Answer:

3/4

Step-by-step explanation:

it is 3/4 anything dividing one is itself

Step-by-step explanation:

21x²-2x +1/2 = 0

x² - 2x ×21 + 1/2× 21 = 0

Answer:

I drew the triangle and centered a circle within; as for "a" I got the center of the circle; the center point is 17/8 by 3/2.Then I averaged and got 14/3 by 18/3? 2 answers.

Step-by-step explanation:

Hope this helped! :)

Answer:

To graph the line with slope -1 passing through the point (-2,4), we can use the point-slope form of the equation of a line, which is:

where m is the slope of the line, and (x1, y1) is the given point on the line. Substituting the given values, we get:

Simplifying this equation, we get:

Now we can graph this line by plotting the given point (-2,4), and then using the slope of -1 to find one or more additional points on the line. We can do this by starting at the given point and then moving one unit down (since the slope is negative) and one unit to the right (since the slope is -1). This gives us the point (-1,3). We can then connect these two points to graph the line.

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Answer:   1.5 years

This is equivalent to 18 months.

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Work Shown:

A = P*(1+r*t)

10330 = 10000*(1+0.022*t)

10330/10000 = 1+0.022*t

1.033 = 1+0.022*t

1.033-1 = 0.022*t

0.033 = 0.022*t

0.022*t = 0.033

t = 0.033/0.022

t = 1.5

She invested the money for 1.5 years

1.5 years = 1.5*12 = 18 months

or you could say

18 months = 12 months + 6 months = 1 year + 6 months

The slope of the given data is 25.

The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is

m=y₂-y₁/x₂-x₁

Jon paid $200 for 8 classes at gold dawn yoga studio.

the cost, y, is proportional to the number of classes purchased, x

The slope will be cost of each class

200/8=25

So the equation will be y=25x

25 is the slope.

Hence, the slope of the given data is 25.

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Answer:

The 99% confidence level for the proportion of all adult Americans who watched streamed programming up to that point in time is (0.514, 0.566). This means that we are 99% sure that the true proportion of all American adults surveyed said they have watched digitally streamed TV programming on some type of device is between 0.514 and 0.566.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \(\pi\), and a confidence level of \(1-\alpha\), we have the following confidence interval of proportions.

\(\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}\)

In which

z is the z-score that has a p-value of \(1 - \frac{\alpha}{2}\).

A poll reported that 54% of 2342 American adults surveyed said they have watched digitally streamed TV programming on some type of device.

This means that \(\pi = 0.54, n = 2342\)

99% confidence level

So \(\alpha = 0.01\), z is the value of Z that has a p-value of \(1 - \frac{0.01}{2} = 0.995\), so \(Z = 2.575\).

The lower limit of this interval is:

\(\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.54 - 2.575\sqrt{\frac{0.54*0.46}{2342}} = 0.514\)

The upper limit of this interval is:

\(\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.54 + 2.575\sqrt{\frac{0.54*0.46}{2342}} = 0.566\)

The 99% confidence level for the proportion of all adult Americans who watched streamed programming up to that point in time is (0.514, 0.566). This means that we are 99% sure that the true proportion of all American adults surveyed said they have watched digitally streamed TV programming on some type of device is between 0.514 and 0.566.

Answer:The amount of a 80% acid solution that must be mixed with a 55% solution to produce 600 mL of a 60% solution can be calculated using a simple algebraic equation. Let x represent the amount of the 80% acid solution in mL that needs to be mixed with the 55% solution.

The equation can be set up as follows:

0.80x + 0.55(600 - x) = 0.60(600)

Step-by-step explanation: The left-hand side of the equation represents the total amount of acid in the mixture. The first term, 0.80x, represents the amount of acid from the 80% solution, and the second term, 0.55(600 - x), represents the amount of acid from the 55% solution. The right-hand side of the equation represents the total amount of acid in the final 60% solution, which is 60% of 600 mL.

By solving this equation for x, we can determine the amount of the 80% acid solution that needs to be mixed with the 55% solution. Once we have the value of x, we can then calculate the amount of the 55% solution by subtracting x from 600 mL.

Internal Link: For a verified answer on a similar topic, check out this link: https://brainly.com/question/1234567 intext:Answer Expert Verified.

Let x=amount of 80% solution needed

Then 600-x=amount of 30% solution needed

Now we know that the pure acid in the 80% solution (0.80x) plus the amount of pure acid in the 30% solution ((0.30)(600-x)) has to equal the amount of pure acid in the final mixture(0.40*600), so our equation to solve is:

0.80x+0.30(600-x)=0.40*600 get rid of parens

0.80x+180-0.30x=240 subtract 180 from each side

0.80x+180-180-0.30x=240-180 collect like terms

0.50x=60 divide each side by 0.50

x=120 ml---------------------amount of 80% solution needed

600-x=600-120=480 ml---------------amount of 30% solution needed

CK

120*0.80+480*0.30=0.40*600

96+144=240

240=240

The fraction of the student that voted candidate B is 31 / 50.

The percentage of the student that voted candidate B is 62%.

A class of 50 students votes for a class president.

Candidate A receives 19 votes.

Candidate B receives 31 votes

The fraction that shows the proportion of student that voted for candidate B is as follows:

fraction of student that voted candidate B = number of student that voted candidate B ÷ total number of students

fraction of student that voted candidate B  = 31 / 50

The percentage of student that voted for candidate B = 31 / 50 × 100

The percentage of student that voted for candidate B = 3100 / 50

The percentage of student that voted for candidate B = 62%

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Using the grid model, the product of 3 and 13 is 39

Product refers to the result of multiplying two or more numbers or quantities together. It is a fundamental operation in arithmetic and algebra. When multiplying two numbers, the product is obtained by adding together a number of copies of one of the numbers, equal to the value of the other number.

Given, two numbers 3 and 9, and a grid.

To determine the product of 3 and 13 just count all the grids covered in 3 rows up to 13 columns or adding 3 for 13 times will result in 39.

Count the grids covered in a red box attached in the image below.

3+3+3+3+3+3+3+3+3+3+3+3+3=39

So, the product of 3 and 13 is 39.

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Answer:

C and E

Step-by-step explanation:

23 > 16 and \(23\geq 16\) are both true statements since the quantity of 23 is greater than that of 16.

2) angle addition postulate

3) 129°

5) substitution property

6) 13x - 1

7) 13x = 130

8) x = 10

9) m∠EFI = 40°

2) From the angle diagram the sum of both angles give angle GFI

m∠GFE + m∠EFI = m∠GFI

Reason: angle addition postulate

3) Since m∠GFI = 129 degree (given)

m∠GFE + m∠EFI = 129°

5) m∠GFE = (9x - 1)°

m∠EFI = 4x°

9x - 1 + 4x = 129

We substituting the angles with the values given.

Hence, it is substitution property

6) we simplify the expression:

9x -1 + 4x = 129

9x + 4x - 1 = 129

13x - 1 = 129 (combine like terms)

7) Add 1 to both sides:

13x - 1 + 1 = 129 + 1

13x = 130 (addition property of equality)

8) divide both sides by 13:

13x/13 = 130/13

x = 10 (division property of equality)

9) m∠EFI = 4x°

m∠EFI = 4(10)

m∠EFI = 40° (substitution property)

Answer:

should be 38 feet

Step-by-step explanation:

P=L+L+W+W

12+12=24

7+7=14

14+24=38

Answer: 3cups

Step-by-step explanation:

List all of the solutions.

3cups = 48 = y = cups = x =

Answer:

3cups

Step-by-step explanation:

Step-by-step explanation:

hugdth guha hjjbvdu hhgdd huu6dv uufffgk ftj ghik

Answer:

The following data relates the time a student spends on an online test with the final score: (8 points, 20 minutes), (22 points, 40 minutes), (33 points, 58 minutes), (38 points, 120 minutes). Use your TI83 to determine the linear regression equation, and choose the best response below a. Points = -9.3(minutes) +0.26

Step-by-step explanation:

That's literally it hehe

7 is not included and hence it is depicted on the number line using an open dot. Hence, solution to the inequality is option B.

In mathematics, inequalities specify the connection between two non-equal numbers. Equal does not imply inequality. Typically, we use the "not equal sign (≠)" to indicate that two values are not equal. But several inequalities are utilized to compare the numbers, whether it is less than or higher than.

The given inequality is:

x + 8 > 15

Subtracting 8 on both sides of the equation:

x + 8 - 8 > 15 - 8

x > 7

Here, 7 is not included and hence it is depicted using an open dot.

Hence, option B is the correct answer.

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Answer:

e-5=2f

take '-5' to the other side where '2f' is

e=2f+5

the call lasted 16 minutes

Answer:

Step-by-step explanation:

Q3 asks for reasons of statements in a theorem proof.

1 Given is correct

2 Definition of right angle is correct

3 should be sum of interior angles in a triangle

4 is substitution

5 subtracting 90degree from left and right hand side

6 is definition of complementary

Answer: 192.. just took the test :)

Step-by-step explanation:

The number of  boxes contains more than 340 nails will be 190. Option B is correct.

The number of standard deviations by which the value of a raw score is above or below the mean value of what is being observed or measured is known as the Z score.

Z score for the 340 nails is found as;

\(\rm Z-score= \frac{340-325}{15} \\\\ Z-score=1\)

If the probability of the z score is grater than 1 is;

P(Z≥1)=1-P(Z≤1)

P(Z≥1)=1-0.8413

P(Z≥1)=0.1587

For the 1200 boxes with more than the 340 nails is 192.

Hence,option B is correct.

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Answer:

x=14√3

y= 28

Step-by-step explanation:

Below i've attached a 30-60-90 triangle

we can see from the picture that the side length opposite from 30 is just a

which means at a=14

The hyp is equal to 2a= 28

and x is equal to 14√3

Percent of change of price is 59%.

The percentage change calculator will measure the difference between two numbers and specify whether the difference is an increase or decrease.

A % change calculator like this one. The number of apples has increased (changed) by 100% from 10 to 20.

When there is a "old" and "new" number or a "initial" and "final" value, this calculator will be utilized most frequently. While a negative change is expressed as a decrease in the absolute value of the percentage value, a positive change is expressed as an increase in the percentage value.

Percentage Change=\(\frac{V2-V1}{V1} *100\);

Given,

V1=34,V2=54;

⇒Percentage change=\(\frac{54-34}{34} *100\)=59%

Percent of change of price is 59%.

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Answer:

The first term is 6; the common difference in 0.8.

Step-by-step explanation:

The nth term is:

\( a_n = a_1 + (n - 1)d \)

The sum of the first n terms is:

\( S_n = \dfrac{n(a_1 + a_n)}{2} \)

\( a_{n} = a_1 + (n - 1)d \)

\( a_{11} = a_1 + (11-1)d \)

\( a_1 + 10d = 14 \)        Equation 1

\( S_n = \dfrac{n(a_1 + a_n)}{2} \)

\( S_{26} = \dfrac{26(a_1 + a_{26})}{2} \)

\( \dfrac{26(a_1 + a_1 + 25d}{2} = 416 \)

\( \dfrac{52a_1 + 650d)}{2} = 416 \)

\( 26a_1 + 325d = 416 \)        Equation 2

Equation 1 and Equation 2 form a system of equations in 2 unknowns.

To eliminate a_1, subtract 26 times Eq. 1 from Eq. 2.

\( 65d = 52 \)

\( d = \dfrac{52}{65} \)

\( d = \dfrac{4}{5} = 0.8 \)

\( a_1 + 10d = 14 \)

\( a_1 + 10 \times 0.8 = 14 \)

\( a_1 + 8 = 14 \)

\( a_1 = 6 \)

Answer:

The first term is 6; the common difference in 0.8.

The domain restrictions for (f/g)(x) are (c) x = 0, 6

From the question, we have the following parameters that can be used in our computation:

f(x) = x² - 5x - 6

g(x) = x² - 6x

The composite function (f/g)(x) is calculated as

(f/g)(x) = f(x)/g(x)

substitute the known values in the above equation, so, we have the following representation

(f/g)(x) = (x² - 5x - 6 )/(x² - 6x)

For the domain restriction, we have

x² - 6x = 0

When solved, we have

x =  6 or x = 0

Hence, the domain restrictions for (f/g)(x) are (c) x = 0, 6

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Question

Given f(x) = x² - 5x - 6 and g(x) = x² - 6x, what are the domain restrictions

for (f/g)(x)?

A) x = +6

B) x = 0

C) x = 0,6

D) x = -2,6

Answer:

z=re ^iθ =2e ^i 3/π

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Step-by-step explanation:

hope this helps

Answer: 12? im pretty sure

Step-by-step explanation: 1/4 of a unit so 4 for 1 unit, 4 x 3 is 12 units for 3