Suppose we have taken independent, random samples of sizes n1 = 7 and n2 = 6 from two normally distributed populations having means µ1 and µ2, and suppose we obtain x ¯ 1   = 245 x¯1⁢  = 245 , x ¯ 2   =  207 x¯2⁢  =⁢  207 , s1 = 4, s2 = 6. Use critical values to test the null hypothesis H0: µ1 − µ2 < 28 versus the alternative hypothesis Ha: µ1 − µ2 > 28 by setting α equal to .10, .05, .01 and .001. Using the equal variance procedure, how much evidence is there that the difference between µ1 and µ2 exceeds 28?

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Solution Given n 7 22u5 U m 6 207 6 H1 28 Ho11 28 us Pooled varian... View the full answer