If the assumptions for a pooled t-interval are satisfied, the formula for a (1 )-level upper
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For a left-tailed hypothesis test at the significance level α, the null hypothesis H0: μ1 = μ2 will be rejected in favor of the alternative hypothesis Ha: μ1
a. Exercise 10.39
b. Exercise 10.40
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(Ri 2/) + (I/n2).
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