8-38. Let X1, . . . ,X25 constitute a set of sample random variables drawn from a...

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8-38. Let X1, . . . ,X25 constitute a set of sample random variables drawn from a population that is N (μ, σ) = N (100, 35). What is the form of the sampling distribution of X? Determine the moment-generating function for X. How is the probability density function for X specified? What is P(X < 90)?

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