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Sample_Exam2_ solutions

# Sample_Exam2_ solutions - MGMT 305 SECOND EXAM(Sample Exam...

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MGMT 305 SECOND EXAM (Sample Exam) Date: March 10, 2010 Part I Multiple-Choice Questions: Identify the letter of the choice that best completes the statement or answers the question. There are 20 multiple-choice questions. 2 points for each question. ____ 1. Suppose we have a lower-tailed test H 0 : µ > µ 0 and Ha: µ < µ 0 . If we reject H 0 at 5% level of significance, which one is the value of the z test statistic? a. 1.4 b. 2.5 c. -1.4 d. -2.5 ____ 2. Which of the following is true about the p-value? ____ 3. Suppose the mean sales volume of an automobile dealership is 15 automobile per month. If the manager of the dealership wants to conduct a research study to see whether a new bonus plan increases the sales volume, then which of the following are the right hypotheses? ____ 4. It is known that the mean of a population is 58. A sample of size 50 is taken and the sample mean is computed as 55. You decided to reject the null hypothesis that μ 60. ____ 5. If the null hypothesis is not rejected at the 2% level of significance, it a. will always be rejected at the 1.5% level of significance. b. will never be rejected at the 3% level of significance. c. may be rejected or not rejected at the 1.5% level of significance.

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d. will never be rejected at the 1.5% level of significance. ____ 6. Two independent simple random samples are selected to test the difference between the means of two populations whose standard deviations are not known. The sample sizes are n 1 = 20 and n 2 = 40. The correct distribution to use is the ____
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