a. Show for the upper-tailed test with s1 and s2 known that as either m or n

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a. Show for the upper-tailed test with s1 and s2 known that as either m or n increases, b decreases when

b. For the case of equal sample sizes and fixed a, what happens to the necessary sample size n as b is decreased, where b is the desired type II error probability at a fixed alternative?

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