1. Suppose you needed to test the claim that the two samples described below come from populations with the same mean. Assume that the samples are independent simple random samples.
Sample 1: n1=7, x??1=25.5, s1=7.1
Sample 2: n2=3, x??2=27.1, s2=8.15
Find:
(a) The estimated degree of freedom is______.
(b) The test statistic is (use Sample 1 - Sample 2)_______.