Data Set 3 in Appendix B includes results from a study described in ?Changes in Body Weight and Fat Mass of Men and Women in the First Year of College: A Study of the ?Freshman 15,?? by Hoffman, Policastro, Quick, and Lee, Journal of American College Health, Vol. 55, No. 1. Refer to that data set and find the proportion of men included in the study. Use a 0.05 significance level to test the claim that when subjects were selected for the study, they were selected from a population in which the percentage of males is equal to 50%.

Data Set 3: Freshman 15 Data Weights are in kilograms, and BMI denotes measured body mass index. Measurements were made in Septem- ber of freshman year and then later in April of freshman year. Results are published in "Changes in Body Weight and Fat Mass of Men and Women in the First Year of College: A Study of the 'Freshman 15"" by Hoffman, Poli- castro, Quick, and Lee, Journal of American College Health, Vol. 55, No. 1. Reprinted with permission of the Helen Dwight Reid Educational Foundation. Published by Heldref Publications, 1319 Eighteenth St., NW, Washington, DC 20036-1802. Copyright (2006). STATDISK: Minitab: Excel: TI-83/84 Plus: Text file names: Data set name is Freshman 15. Worksheet name is FRESH15.MTW. Workbook name is FRESH15.XLS. App name is FRESH and the file names are the same as for text files. WTSEP, WTAPR, BMISP, BMIAP. Weight in SEX September 72 LEuuuuu uuLL LLULuuuuuuuuuu NOMORFR8888h M 97 74 93 68 59 64 70 58 50 71 67 56 70 92 57 67 58 49 68 69 87 81 60 52 70 63 56 68 54 80 64 63 54 56 54 73 77 63 51 65 53 62 55 74 74 64 64 57 64 60 64 66 52 71 65 75 42 74 94 Weight in April 59 86 69 88 64 ROKFOR-hoondonon25%8FRO 55 60 53 68 56 47 69 66 55 68 60 92 67 50 68 69 88 61 53 71 64 57 69 69 56 66 59 65 56 56 75 79 66 54 62 68 56 65 77 78 68 68 61 68 64 68 71 57 77 60 71 82 49 82 105 BMI in September 22.02 19.70 24.09 26.97 21.51 18.69 24.24 21.23 30.26 21.88 17.63 24.57 20.68 20.97 27.30 23.30 19.48 24.74 20.69 20.49 21.09 18.37 22.40 28.17 23.60 26.52 18.89 19.31 20.96 21.78 19.78 22.40 22.76 20.15 22.14 20.27 22.15 23.87 18.61 21.73 18.93 25.88 28.59 21.89 18.31 19.64 23.02 20.63 22.61 22.03 20.31 20.31 19.59 21.05 23.47 22.84 19.50 18.51 21.40 17.72 22.26 21.64 22.51 23.69 15.08 22.64 36.57 BMI in April 18.14 17.44 22.43 25.57 20.10 17.40 22.88 20.23 29.24 21.02 16.89 23.85 20.15 20.36 26.73 22.88 19.24 24.69 20.79 20.60 21.24 18.53 22.61 28.43 23.81 26.78 19.27 19.75 21.32 22.22 20.23 22.82 23.19 20.69 22.57 20.76 22.93 24.67 19.34 22.58 19.72 26.72 29.53 22.79 19.28 20.63 24.10 21.91 23.81 23.42 21.34 21.36 20.77 22.31 25.11 24.29 20.90 19.83 22.97 19.42 23.87 23.81 24.45 25.80 17.74 25.33 40.86