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Case 5. Use the info given below to answer the five questions that follow. A corporation randomly selects 200 salespeople and finds that 156 who have never taken a self-improvement course would like to take such a course. The firm did a similar study 10 years ago in which 112 of a random sample of 170 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let p1 and p2 represent the true proportion of workers who would like to attend a self-improvement course in the current study and the past study respectively. The firm wants to test whether their current course recruitment efforts resulted in a greater proportion of workers that want to attend a self-improvement course than in the past. 23. What are the correct null and alternative hypotheses for the above situation? A. H0: p1 ? p2 Ha: p1 > p2 B. H0: ?1 ? ?2 Ha: ?1 < ?2 C. H0: p1 = p2 Ha: p1 ? p2 D. H0: p1 ? p2 Ha: p1 < p2 E. H0: ?1 = ?2 Ha: ?1 ? ?2 24. What is the pooled or common proportion that attend the self-improvement course? A. 0.78 B. 0.66 C. 0.72 D. 0.12 E. 1.39 25. What is the sample difference between the proportions (i.e., as found in the samples)? B. 0.78 B. 0.66 C. 1.39 D. 0.72 E. 0.12 26. What is the critical (table) value for the test of hypothesis for this problem if ? = 0.01? C. 1.645 B. 2.33 C. 1.96 D. 2.57 E. 1.28 27. If the computed test statistic is 1.06, what are the decision and conclusion of the test at the 0.01 significance level? A. Fail to reject the null hypothesis, conclude there is sufficient evidence that the proportion of workers that want to attend the course has decreased. B. Reject the null hypothesis; conclude there is no evidence of difference in proportions. C. Fail to reject the null hypothesis, conclude there is sufficient evidence of difference in proportions. D. Reject the null hypothesis, conclude there is evidence that the proportion of workers that want to attend the course has increased. E. Fail to reject the null hypothesis, conclude there is insufficient evidence that the proportion of workers that want to attend the course has increased.

Case 5. Use the info given below to answer the five questions that follow.
A corporation randomly selects 200 salespeople and finds that 156 who have never taken a self-improvement course would like to take such a course. The firm did a similar study 10 years ago in which 112 of a random sample of 170 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let p1 and p2 represent the true proportion of workers who would like to attend a self-improvement course in the current study and the past study respectively. The firm wants to test whether their current course recruitment efforts resulted in a greater proportion of workers that want to attend a self-improvement course than in the past.

23. What are the correct null and alternative hypotheses for the above situation?
A. H0: p1 ? p2 Ha: p1 > p2
B. H0: ?1 ? ?2 Ha: ?1 < ?2
C. H0: p1 = p2 Ha: p1 ? p2
D. H0: p1 ? p2 Ha: p1 < p2
E. H0: ?1 = ?2 Ha: ?1 ? ?2

24. What is the pooled or common proportion that attend the self-improvement course?
A. 0.78 B. 0.66 C. 0.72 D. 0.12 E. 1.39

25. What is the sample difference between the proportions (i.e., as found in the samples)?
B. 0.78 B. 0.66 C. 1.39 D. 0.72 E. 0.12

26. What is the critical (table) value for the test of hypothesis for this problem if ? = 0.01?
C. 1.645 B. 2.33 C. 1.96 D. 2.57 E. 1.28

27. If the computed test statistic is 1.06, what are the decision and conclusion of the test at
the 0.01 significance level?
A. Fail to reject the null hypothesis, conclude there is sufficient evidence that the
proportion of workers that want to attend the course has decreased.
B. Reject the null hypothesis; conclude there is no evidence of difference in proportions.
C. Fail to reject the null hypothesis, conclude there is sufficient evidence of difference in
proportions.
D. Reject the null hypothesis, conclude there is evidence that the proportion of workers
that want to attend the course has increased.
E. Fail to reject the null hypothesis, conclude there is insufficient evidence that the
proportion of workers that want to attend the course has increased.

Case 5. Use the info given below to answer the five questions that follow.
A corporation randomly selects 200 salespeople and finds that 156 who have never taken a self-improvement course would like to take such a course. The firm did a similar study 10 years ago in which 112 of a random sample of 170 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let p1 and p2 represent the true proportion of workers who would like to attend a self-improvement course in the current study and the past study respectively. The firm wants to test whether their current course recruitment efforts resulted in a greater proportion of workers that want to attend a self-improvement course than in the past.

23. What are the correct null and alternative hypotheses for the above situation?
A. H0: p1 ? p2 Ha: p1 > p2
B. H0: ?1 ? ?2 Ha: ?1 < ?2
C. H0: p1 = p2 Ha: p1 ? p2
D. H0: p1 ? p2 Ha: p1 < p2
E. H0: ?1 = ?2 Ha: ?1 ? ?2

24. What is the pooled or common proportion that attend the self-improvement course?
A. 0.78 B. 0.66 C. 0.72 D. 0.12 E. 1.39

25. What is the sample difference between the proportions (i.e., as found in the samples)?
B. 0.78 B. 0.66 C. 1.39 D. 0.72 E. 0.12

26. What is the critical (table) value for the test of hypothesis for this problem if ? = 0.01?
C. 1.645 B. 2.33 C. 1.96 D. 2.57 E. 1.28

27. If the computed test statistic is 1.06, what are the decision and conclusion of the test at
the 0.01 significance level?
A. Fail to reject the null hypothesis, conclude there is sufficient evidence that the
proportion of workers that want to attend the course has decreased.
B. Reject the null hypothesis; conclude there is no evidence of difference in proportions.
C. Fail to reject the null hypothesis, conclude there is sufficient evidence of difference in
proportions.
D. Reject the null hypothesis, conclude there is evidence that the proportion of workers
that want to attend the course has increased.
E. Fail to reject the null hypothesis, conclude there is insufficient evidence that the
proportion of workers that want to attend the course has increased.

Added by Zachary P.

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