For the test of the null hypothesis H,: u, = u, against the two-sided alternative H, # 2, two random samples with sizes n, = 10 and n, = 10 from two independent normal populations are taken. The...

Extracted text: For the test of the null hypothesis H,: u, = u, against the two-sided alternative H, # 2, two random samples with sizes n, = 10 and n, = 10 from two independent normal populations are taken. The variances of the two populations are o,=7 and a, 6, respectively. The sample means (X bar) were found to be 37.3 and 38.8 respectively. Find the observed value, z, of the Z-statistic. Select one: a. 1.95 b. None of the answers C.-1.31 d.-2.13 O O O O