4.2.8.JLet A denote the mean of a random sample of size n from a distribution that has mean u and variance o? 10. Find n so that the probability is approximately 0.954 that the random interval (X - , X+) includes u.

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A: Solution: 8. From the given information, n=25 and M=68.

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Q: A sample of n=25 scores has a mean of M=68. Find the z-scores for this sample: if it was obtained…

A: Sample size = 25 Sample mean = 68 Mean = 60 Standard deviation = 40

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