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24. Suppose X has a normal distribution and I represents the average of a sample of size n. Which of the following is true? a.

24. Suppose X has a normal distribution and I represents the average of a sample of size n. Which of the following is true? a. X has an approximate normal distribution for any value of n. b. X has an approximate normal distribution if n is large enough. c. X has an exact normal distribution for any value of n. d. X has an exact normal distribution if the sample size is large enough

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