The purpose of this activity is to give you guided practice in obtaining and interpreting a 95% confidence interval for ?1 ? ?2 following a two-sample T-test that rejected H0. Recall our second example:

Age Group (x): 20-29 or 75+ Pop. 1: males 20-29 yrs old Pop. 2: males 75+ yrs old Y Weight * Y Mean: H1 Mean: H2 5RS of size 712 5RS of size 1001 Mean: 83.4 Mean. 78.5 50: 18.7 50: 19.0