Assignment:
Assume that both samples are independent simple random samples from populations having normal distributions.
Freshman 15 Study Use the sample weights (in kg) of male and female college students measured in April of their freshman year, as listed in Data Set 3 in Appendix B. Use a 0.05 significance level to test the claim that near the end of the freshman year, weights of male college students vary more than weights of female college students.
Data Set: Freshman 15 Data
Weights are in kilograms, and BMI denotes measured body mass index. Measurements were made in September 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, Policastro, 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.
Statdisk: Data set name is Freshman15.
Minitab: Worksheet name is Fresh15. MTW.
Excel: Workbook name is Fresh15.XLS.
TI-83/84 Plus: App name is Fresh and the file names are the same as for text files.
Text file names: WTSEP, WTAPR,BMISP,BMIAP.
