Question

1. What is the critical F value when the sample size for the numerator is five and the sample size for the denominator is eight? Use a two-tailed test and the 0.02 significance level. (Round your answer to 2 decimal places.)

2.

Arbitron Media Research Inc. conducted a study of the iPod listening habits of men and women. One facet of the study involved the mean listening time. It was discovered that the mean listening time for a sample of 9 men was 43 minutes per day. The standard deviation was 21 minutes per day. The mean listening time for a sample of 8 women was also 43 minutes, but the standard deviation of the sample was 13 minutes. Use a two-tailed test and at 0.10 significance level, can we conclude that there is a difference in the variation in the listening times for men and women? (Round your answer to 3 decimal places.)

The test statistic is :
Decision:  (Click to select)  Do not reject  Reject  H0:σ21=σ22.

3. A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary. The sample information is submitted to Minitab with the following results:

Analysis of Variance
Source	df	SS	MS	F	P
Factor	3	28.17	9.39	5.37	0.010
Error	15	26.26	1.75
Total	18	54.43

What is the decision rule? (Round your answer to 2 decimal places.)

At the 0.05 level of significance, is there a difference in the mean number of months before a raise was granted among the four CPA firms?

• Reject

• Do not reject

Answer 1