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Suppose that the mean length of time a person shows flu symptoms is 7.2 days with a standard deviation of 1.8 days. a) Find the

Suppose that the mean length of time a person shows flu symptoms is 7.2 days with a standard deviation of 1.8 days.

a) Find the probability that the length of time a person shows flu symptoms is at most 9 days.

b) Find the probability that, in a sample of 37 people, the average length of time the people show flu symptoms is between 6.3and 7 days.

c) Find the probability that, in a sample of 9 people, the average length of time the people show flu symptoms is at least 5.2days.Assume that the data is normally distributed.

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