Question: Suppose that the sample means and variances are X 1 = 15, X 2 = 12, s 2 1 = 8, s 2 2 =

Suppose that the sample means and variances are X¯ 1 = 15, X¯ 2 = 12, s 2

1 = 8, s 2

2 = 24 with sample sizes n1 = 20 and n2 = 10.

Verify that s 2

p = 13.14, T = 2.14 and that Student’s t-test rejects the hypothesis of equal means with α = .05.

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