Question: Refer to Exercise 7.21. Find the probability that the sample mean is greater than 55. Exercise 7.21 A random sample of size n = 49

Refer to Exercise 7.21. Find the probability that the sample mean is greater than 55.
Exercise 7.21
A random sample of size n = 49 is selected from a population with mean µ = 53 and standard deviation σ = 21.

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