Question

for the indicated veryothes, evel of significance and samples and Assume that the samples are independent, normal and random. Answer Use the stribution table to find the critical parts and HP 0.025, 13, 11 (a) Find the critical value) suming that the population variances are equal parte aswers as needed) (Type an integer or decimal rounded to three decimal places as needed. Use a comme to (1) Find the critical value') assuming that the population variances are not equal (Type an integer or decimal rounded to three decimal places as needed. Use a comme to see as needed

Answer 1

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④ When population variances are equal degrees of freedom ani+ng-2 = 13+11-2-22, critical to valve (left tail) - 2.073.8) 2) - 2.0738 when population variance are not equal we consider af smaller of n, 1 or nout df = 13-1 =12 critical t value (left tail) =(-2.1788)