Question: Which samples show unequal variances? Use α = .05 in all tests. Show the critical values and degrees of freedom clearly and illustrate the decision rule.

1. s 1 = 5.1, n 1 = 11, s 2 = 3.2, n 2 = 8, two-tailed test
2. s 1 = 221, n 1 = 8, s 2 = 445, n 2 = 8, left-tailed test
3. s 1 = 67, n 1 = 10, s 2 = 15, n 2 = 13, right-tailed test

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