10.24 An independent-samples t test and getting ready for a date: In an example, we sometimes use in our statistics classes, several semesters’ worth of male and female students were asked how long, in minutes, they spend getting ready for a date. The data reported below reflect the actual means and the approximate standard deviations for the actual data from 142 students. Men: 28, 35, 52, 14 Women: 30, 82, 53, 61

a. Conduct all six steps of an independent-samples t test. Be sure to label all six steps.

b. Report the statistics as you would in a journal article.

c. Calculate the 95% confidence interval.

d. Calculate the 90% confidence interval.

e. How are the confidence intervals different from each other? Explain why they are different.

f. Calculate the appropriate measure of effect size. g. Based on Cohen’s conventions, is this a small, medium, or large effect size? h. Why is it useful to have this information in addition to the results of a hypothesis test?