A company collects data on the lengths of telephone calls made by employees in two different divisions. The mean and standard deviation for the sales division are 10.26 and 8.56, respectively. The mean and standard deviation for the shipping and receiving division are 6.93 and 4.93, respectively. A hypothesis test was run, and the computer output follows. Degrees of freedom = 56 Test statistic t = 1.89566 Critical value t = -2.0037, 2.0037 P-value = 0.06317 Significance level = 0.05 Questions Your Answers 1. Are the samples independent or dependent? 2. How many samples were in the study?
A company collects data on the lengths of telephone calls made by employees in two different divisions. The mean and standard deviation for the sales division are 10.26 and 8.56, respectively. The mean and standard deviation for the shipping and receiving division are 6.93 and 4.93, respectively. A hypothesis test was run, and the computer output follows.
Degrees of freedom = 56
Test statistic t = 1.89566
Critical value t = -2.0037, 2.0037
P-value = 0.06317
Significance level = 0.05
Questions Your Answers
1. Are the samples independent or dependent?
2. How many samples were in the study?
3. Which number from the output is compared to the critical value to check if the null hypothesis should be rejected?
4. Which number from the output is compared to the significance level or alpha to check if the null hypothesis should be rejected?
5. Was a right-, left-, or two-tailed test done? Why?
6. What are your conclusions?
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