Insomnia, at last Exercises 10, 22, and 24 describe anexperiment investigating the effectiveness of exercise incombating insomnia. Suppose some of the 40 subjectshad maintained a healthy weight, but others were quiteoverweight. Why might researchers choose to block thesubjects by weight level before randomly assigning someof each group to the exercise program?

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A: Solution

Q: 18

A: Here use t test of paired data

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A: Consider, Population proportion (p) = 24% Sample size (n) = 1000

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A: x1 = 75x2 =50 n1 =15n2 =15 s12 = 5s22 = 8

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