Question 1

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-True or False: Referring to Scenario 12-2, the null hypothesis should be rejected.

Accepted Answer

False

Question 2

True or False: A test for whether one proportion is higher than the other can be performed using
the chi-square distribution.

Accepted Answer

False

Question 3

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-True or False: Referring to Scenario 12-2, the same decision would be made with this test if the
level of significance had been 0.01 rather than 0.05.

Accepted Answer

The p-value for the test is 0.048, which is less than 0.05 but greater than 0.01. Therefore, the decision would be to reject the null hypothesis at the 0.05 level of significance but not at the 0.01 level of significance.

Question 4

SCENARIO 12-4
A computer used by a 24-hour banking service is supposed to randomly assign each transaction to
one of 5 memory locations.A check at the end of a day's transactions gave the counts shown in the
table to each of the 5 memory locations, along with the number of reported errors.  The bank manager wanted to test whether the proportion of errors in transactions assigned to each of
the 5 memory locations differ.
-Referring to Scenario 12-4, which test would be used to properly analyze the data in this
Experiment?

Accepted Answer

The answer of SCENARIO 12-4
A computer used by a 24-hour...

Question 5

SCENARIO 12-1 
-Referring to Scenario 12-1, the company tests to determine at the 0.05 level whether the
Population proportion has changed from the previous study.Which of the following is most
Correct?
A) Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has changed over the intervening 10 years.
B) Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years.
C) Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.
D) Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.

Accepted Answer

The null hypothesis is that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years. The alternative hypothesis is that the proportion has changed. The p-value is 0.05, which means that there is a 5% chance of rejecting the null hypothesis when it is true. Since the p-value is greater than 0.05, we do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years.

Question 6

SCENARIO 12-3  She will use this information to perform a chi-square hypothesis test using a level of significance of
-True or False: Referring to Scenario 12-3, the decision made suggests that there is a difference
between the proportion of males and females who ride local versus non-local routes.

Accepted Answer

The decision indicates a difference in proportions, suggesting that gender affects the choice between local and non-local routes.

Question 7

SCENARIO 12-1 
-

Accepted Answer

The answer of SCENARIO 12-1 
-...

Question 8

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-

Accepted Answer

The answer of SCENARIO 12-2
The dean of a college is...

Question 9

In testing a hypothesis using the  test, the theoretical frequencies are based on the
A) null hypothesis.
B) alternative hypothesis.
C) normal distribution.
D) None of the above.

Accepted Answer

The answer of In testing a hypothesis using the ...

Question 10

SCENARIO 12-1 
-

Accepted Answer

The answer of SCENARIO 12-1 
-...

Question 11

If we use the  method of analysis to test for the differences among 4 proportions, the degrees
Of freedom are equal to:
A) 3
B) 4
C) 5
D) 1

Accepted Answer

The answer of If we use the  method of...

Question 12

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-Referring to Scenario 12-2, the null hypothesis will be rejected if the test statistic is ________.

Accepted Answer

The answer of SCENARIO 12-2
The dean of a college is...

Question 13

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-True or False: Referring to Scenario 12-2, the same decision would be made with this test if the
level of significance had been 0.10 rather than 0.05.

Accepted Answer

The answer of SCENARIO 12-2
The dean of a college is...

Question 14

SCENARIO 12-2
The dean of a college is interested in the proportion of graduates from his college who have a job
offer on graduation day.He is particularly interested in seeing if there is a difference in this
proportion for accounting and economics majors.In a random sample of 100 of each type of major at
graduation, he found that 65 accounting majors and 52 economics majors had job offers.If the
accounting majors are designated as "Group 1" and the economics majors are designated as "Group
2," perform the appropriate hypothesis test using a level of significance of 0.05.
-Referring to Scenario 12-2, the value of the test statistic is ________.

Accepted Answer

The answer of SCENARIO 12-2
The dean of a college is...

Question 15

True or False: The squared difference between the observed and theoretical frequencies should
be large if there is no significant difference between the proportions.

Accepted Answer

A large squared difference indicates a significant difference between observed and theoretical frequencies, suggesting that the proportions are not similar.

Question 16

If we wish to determine whether there is evidence that the proportion of items of interest is the
Same in group 1 as in group 2, the appropriate test to use is

Accepted Answer

The answer of If we wish to determine whether there...

Question 17

True or False: A test for the difference between two proportions can be performed using the chi-
square distribution.

Accepted Answer

A chi-square test can be used to determine if there is a significant difference between the proportions of two categorical variables.

Question 18

SCENARIO 12-1 
-

Accepted Answer

The answer of SCENARIO 12-1 
-...

Question 19

SCENARIO 12-3  She will use this information to perform a chi-square hypothesis test using a level of significance of
-True or False: Referring to Scenario 12-3, the null hypothesis will be rejected.

Accepted Answer

The null hypothesis states that there is no difference between the mean of the two groups. The t-test statistic is -2.57, which is less than the critical value of -2.326. This means that the null hypothesis is rejected and we can conclude that there is a difference between the mean of the two groups.

Question 20

True or False: In testing the difference between two proportions using the normal distribution,
we may use either a one-tail Chi-square test or two-tail Z test.

Accepted Answer

The normal distribution can be used to test the difference between two proportions, and either a one-tail Chi-square test or two-tail Z test can be used.

Quiz 12: Chi-Square and Nonparametric

True or False: A test for whether one proportion is higher than the other can be performed using the chi-square distribution.

SCENARIO 12-1 -Referring to Scenario 12-1, the company tests to determine at the 0.05 level whether the Population proportion has changed from the previous study.Which of the following is most Correct?

SCENARIO 12-3 She will use this information to perform a chi-square hypothesis test using a level of significance of -True or False: Referring to Scenario 12-3, the decision made suggests that there is a difference between the proportion of males and females who ride local versus non-local routes.

In testing a hypothesis using the test, the theoretical frequencies are based on the

If we use the method of analysis to test for the differences among 4 proportions, the degrees Of freedom are equal to:

True or False: The squared difference between the observed and theoretical frequencies should be large if there is no significant difference between the proportions.

True or False: A test for the difference between two proportions can be performed using the chi- square distribution.

SCENARIO 12-3 She will use this information to perform a chi-square hypothesis test using a level of significance of -True or False: Referring to Scenario 12-3, the null hypothesis will be rejected.

True or False: In testing the difference between two proportions using the normal distribution, we may use either a one-tail Chi-square test or two-tail Z test.