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Use the​ t-distribution table to find the critical​ value(s) for the indicated alternative​ hypotheses, level of...

Use the​ t-distribution table to find the critical​ value(s) for the indicated alternative​ hypotheses, level of significance alpha​, and sample sizes n 1 and n 2. Assume that the samples are​ independent, normal, and random. Answer parts​ (a) and​ (b). Upper H Subscript a​: mu 1 not equals mu 2​, alphaequals0.20​, n 1equals10​, n 2equals2 ​(a) Find the critical​ value(s) assuming that the population variances are equal. nothing ​(Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as​ needed.) ​(b) Find the critical​ value(s) assuming that the population variances are not equal. nothing ​(Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as​ needed.)

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