Please help #3

3. John Worrall and colleagues (2014) found that the fear of losing the good opinion of one's family and peers kept people from driving home drunk. Let's say we have two independent random samples of people: those who think that their peers would disap prove of them for driving drunk, and those who think that their peers would either not care or approve of their driving drunk. We ask each person in each group to self-report the number of times that he or she has driven drunk in the past 12 months. Here are the results: Would Not Approve Would Approve of of Driving Drunk Driving Drunk n, = 40 n, = 25 X1 = 2.1 X2 = 8.2 S, = 1.8 S, = 1.9 Test the null hypothesis that the two population means are equal against the alternative hypothesis that the group whose peers would not approve of driving drunk has a lower mean rate of driving drunk. In your hypothesis test, assume that the unknown population standard deviations are equal, and use an alpha level of . 01