Question: (b) (9 points) Suppose 20 students are selected at random. What is the probability that the mean time writing a paper for these 20

(b) (9 points) Suppose 20 students are selected at random. What is

(b) (9 points) Suppose 20 students are selected at random. What is the probability that the mean time writing a paper for these 20 students is not more than 7 hours? Answer: The probability is

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