For items 27 to 29: A professor wants to determine whether there is a difference in the final averages between the past two semesters. Of his business statistics classes. For a random sample of 16 students from semester 1, the mean of the final averages was 75 with standard deviation of For a random sample of 9 students from semester 2, the mean was 73 with standard deviation of 27. If the final averages form semester 1 and 2 are assumed to be normally distributed with equal variances. Which of the following is the appropriate set of hypotheses? A. Ho: H1 - H2 s O vs HA: µ1 – µz > 0 B. Ho: H1 - H2 0 vs H4: H1 – H2 <0 C. Ho: H1 - Hz = 0 vs Ha: µ1 – H2 # 0 D. Ho: H1 - H2 0 vs HA: H1 – H2 = 0 28. What is the computed test statistics for the appropriate test? B. t = 0.8944 A. z 1.9964 C. t = 1.0018 D. z = 0.5009 29. What is the correct decision for the appropriate test at a 0.05 level of significance when the population variances are assumed to be equal? A. Do not reject the null hypothesis. B. Reject the null hypothesis BE C. Reject the alternate hypothesis D. Do not reject the alternate hypothesis.

For items 27 to 29: A professor wants to determine whether there is a difference in the final averages between the past two semesters. Of his business statistics classes. For a random sample of 16 students from semester 1, the mean of the final averages was 75 with standard deviation of For a random sample of 9 students from semester 2, the mean was 73 with standard deviation of 27. If the final averages form semester 1 and 2 are assumed to be normally distributed with equal variances. Which of the following is the appropriate set of hypotheses? A. Ho: H1 - H2 s O vs HA: µ1 – µz > 0 B. Ho: H1 - H2 0 vs H4: H1 – H2 <0 C. Ho: H1 - Hz = 0 vs Ha: µ1 – H2 # 0 D. Ho: H1 - H2 0 vs HA: H1 – H2 = 0 28. What is the computed test statistics for the appropriate test? B. t = 0.8944 A. z 1.9964 C. t = 1.0018 D. z = 0.5009 29. What is the correct decision for the appropriate test at a 0.05 level of significance when the population variances are assumed to be equal? A. Do not reject the null hypothesis. B. Reject the null hypothesis BE C. Reject the alternate hypothesis D. Do not reject the alternate hypothesis.

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Description: For items 27 to 29: A professor wants to determine whether there is a difference in the finalaverages between the past two semesters. Of his business statistics classes. For a random sampleof 16 students from semester 1, the mean of the final averag

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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