Step 3 find the critical value for the rejection region t=

Members of fraternities and sororities are required to volunteer for community service. Do fraternity brothers work les volunteer hours on average than sorority sisters? The data below show the number of volunteer hours worked for 9 randomly selected fraternity brothers and 9 randomly selected sorority sisters. Assume both populations are normally distributed and average 1 is the average hours of community service worked by fraternity borothers. Brothers: 9 13 14 10 15 5 Sisters: 15 16 18 11 14 20 13 19 17 Assume both follow a Normal distribution. What can be concluded at the o = .01 level of significance? Round all answers to 4 places where possible. Step (1) Determine the null and alternative hypotheses. Ho: #1 He: ul Step (2) Determine the test statistic and p-value. Test Statistic: tv -3.8225 0 0007