It is assumed that the standard deviation is known and 90% confidence level is used in the mean difference. The data supplied in the example is: n1 = 10 n2 = 12 oi = 1 G2 = 1.5 fl = 87.6 922 = T45 Questions: 1. If you change the alpha from 0.05 to an alpha of 0.01, the critical Z for a two tail test use in the hypothesis testing {from the table) is 1 2.5?8? a. True b. False 2. The experimental Z in the test of hypothesis is 24.4? a. True b. False 3. The null hypothesis is rejected? a. True b. False