Answer

Question 2 (1 point) An experiment sought to discover if a course on nutrition would inuence the body mass index of the students enrolled. Measures of body fat percents were taken before the year long course and then again at the end of the course for 5 students. The data is as follows. ---- -25.67 35.79 2.96 15.61 * fter 24.60 18.53 36.01 2.53 14.06 Test the claim at the 0.05 level of signicance that the mean body fat percentages of the students decreased by the end of the course. Denote by MD the mean of the differences of the body fat percents for all students, where D=\"Before After". Denote by [11 and [12 the means of the body fat percents before and after the course for all students, respectively. Test the appropriate hypotheses. Which test procedure would you use to test the hypotheses? O Z-test for the population means 0 Paired sample t-test O Z-test for the population proportions O F-test 0 Independent sample t-test