Question

Question 6

The Chi-Square Test for Independence is typically a ______________.

a. left-tailed test

b. right-tailed test

c. two-tailed test

d. wagging-tailed test

Question 7

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

a. Goodness-of-Fit

b. Test of Independence

Question 8

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

a. Goodness-of-fit

b. Test of Independence

Question 9

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. Goodness-of-Fit

b. Test of Independence

Question 10

An eight-sided die is rolled 160 times. The number of 1’s, 2’s, 3’s, 4’s, 5’s, 6’s, 7’s & 8’s obtained are 24, 36, 15, 17, 9, 22, 18 & 19, respectively. We are testing to see if the die is fair. What is the test statistic for this problem?

a. 12.7

b. 21.8

c. 9.4

d. 46.3

Answer 1

Question 6:
Correct option:

b. right-tailed test

Question 7:
Correct option:

a. Goodness-of-Fit

Question 8:
Correct option:

b. Test of Independence

Question 9:
Correct option:

b. Test of Independence

Question 10:
Correct option:

b.   21.8

Explanation:
Expected Frequency = 160/8 = 20

Test Statistic is got as follows:

Observed (O)	Expected (E)	(O - E)2/E
24	20	1.8
36	20	12.8
15	20	1.25
17	20	0.45
9	20	6.05
22	20	0.2
18	20	0.2
19	20	0.05
Total = =		21.8