Question

Question 1

The expected values are what we have from ______________.

a. data

b. sampling

c. theory

​​​​​​​d. experiments

Question 2

What is the relationship between the mean and the standard deviation of the chi-square distribution?

a. The standard deviation is twice the mean.

b. The standard deviation is the square root of 2 times the mean.

c. They are the same.

d. They are inverses of each other.

Question 3

As the degrees of freedom increase, the graph of the chi-square distribution looks more and more:

a. skewed right

b. asymmetrical

c. skewed left

d. symmetrical

Question 4

Most of the time, the Goodness-of-Fit is a:

a. right-tailed test

b. two-tailed test

c. left-tailed test

d. wagging-tailed test

Question 5 Which test is the correct one to use when determining if a class distribution of grades follows the normal distribution?

a. Test of Independence

b. Goodness-of-Fit

Question 6

Which test is the correct one to use when determining if the numbers picked in the lottery are randomly selected?

a. Test of Independence

b. Goodness-of-fit

Question 7

This is a free question. The answer is 21.8.

a. 21.8

b. 9.4

c. 12.7

d. 46.3

Question 8

Most of the time, the Test for Independence is a:

a. two-tailed test

b. left-tailed test

c. right-tailed test

d. wagging-tailed test

Question 9

Which test is the correct one to use when determining if the gender of a person is independent from the college major of the person?

a. Test for Independence

b. Goodness-of-Fit

Question 10

W​​​​​​​hich test is the correct one to use when determining if the religion of a person is related to his/her political party affiliation?

a. Test of Independence

b. Goodness-of-Fit

Answer 1

Question 1

The expected values are what we have from Sampling

Because using sample we can estimate the parameters of the population.

Question 2

What is the relationship between the mean and the standard deviation of the chi-square distribution?

a. The standard deviation is twice the mean.

If X follows chi-square distribution with parameter n ( df = n) then mean = n and standard deviation = 2*n = 2* mean

Question 3

As the degrees of freedom increase, the graph of the chi-square distribution looks more and more:

d. symmetrical

Question 4

Most of the time, the Goodness-of-Fit is a:

a. right-tailed test

Question 5 Which test is the correct one to use when determining if a class distribution of grades follows the normal distribution?

a. Test of Independence

Question 9

Which test is the correct one to use when determining if the gender of a person is independent from the college major of the person?

a. Test for Independence

Question 10

Which test is the correct one to use when determining if the religion of a person is related to his/her political party affiliation?

a. Test of Independence