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12. A random sample X1. ... X, from a normal distribution with mean # = 15 and standard deviation o = 4. Suppose X is

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12. A random sample X1. ... X, from a normal distribution with mean # = 15 and standard deviation o = 4. Suppose X is the sample mean of the random sample. Which of the following is closest to P(X > 16)? (a) 0.23 (b) 0.67 (c) 0.75 (d) 0.77 Explanation

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