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. Use a significance level of α=0.05 Sample...

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. Use a significance level of α=0.05

Sample 1: n1=3, x⎯⎯⎯1=20.9, s1=9.52
Sample 2: n2=18, x⎯⎯⎯2=23.9, s2=4.64

(a) The degree of freedom is