1. Arbitron Media Research Inc. conducted a study of the iPod listening habits o
ID: 3316545 • Letter: 1
Question
1.
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 men was 28 minutes per day. The standard deviation of the sample of the 15 men studied was 9 minutes per day. The mean listening time for the 14 women studied was also 28 minutes, but the standard deviation of the sample was 14 minutes. At the 0.05 significance level:
Do not reject
2.
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:
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?
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 men was 28 minutes per day. The standard deviation of the sample of the 15 men studied was 9 minutes per day. The mean listening time for the 14 women studied was also 28 minutes, but the standard deviation of the sample was 14 minutes. At the 0.05 significance level:
Explanation / Answer
As per the Chegg policy, we are advised to do only one question at a time so i am attempting the 1st one.
1. The statistical software output for this problem is:
Two sample variance summary hypothesis test:
12 : Variance of population 1
22 : Variance of population 2
12/22 : Ratio of two variances
H0 : 12/22 = 1
HA : 12/22 1
Hypothesis test results:
Hence,
1) Test statistic = 0.41
2) Since p - value is greater than 0.05, do not reject Ho
Ratio Num. DF Den. DF Sample Ratio F-Stat P-value 12/22 14 13 0.41326531 0.41326531 0.1134Related Questions
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