Assume that both populations are normally distributed. (a) Test whether mu 1 not equals mu 2 at the alpha equals 0.01 level of significance for the given sample data. (b) Construct a 99% confidence interval about mu 1 minus mu 2. Population 1 Population 2 n 10 10 x overbar 13.2 11 s 3.7 3.9 (a) Test whether mu 1 not equals mu 2 at the alpha equals 0.01 level of significance for the given sample data. Determine the null and alternative hypothesis for this test.