Hw 7,4

Assume there is a sample of n, = 8, with the sample mean X, = 35 and a sample standard deviation of S, = 4, and there is an independent sample of n2 = 7 from another population with a sample mean of X2 = 31 and a sample standard deviation S2 = 5. In performing the pooled-variance t test, how many degrees of freedom are there? There are degrees of freedom. (Simplify your answer.)