*10.5 MINITAB was used to complete a t-test of the difference between the two means using the Login at cengagebrain.com. C.I. for mu males - mu females: ( -2.9,15.5) Sample 1 33.7 21.6 32.1 38.2 33.2 35.9 34.1 39.8 23.5 21.2 23.3 18.9 .