1. A portion of a study by Wechsler (1958) reports that for 100 males taking the Wechsler Adult Intelligence Scale (WAIS), the sample mean and variance on picture completion are X‾= 9.79 and s = 2.72. Test the hypothesis H0:µ ≥ 10.5 with α = .025.
2. Assuming 20% trimming, test the hypothesis H0:µt = 42 with α = .05 and n = 20 given the following values for X‾t and sw: (a) X‾t = 44, sw = 9, (b) X‾t = 43, sw = 9, (c) X‾t = 43, sw = 3.