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Find the probability that the mean age of a sample of 25

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The average annual age of doctors in a certain hospital is 44.0 years old with a standard deviation of 4.0 years. Assume that the variable is normally distributed.

(a) Find the probability that the age of a randomly selected doctor is less than 44.32 years.

(b) Find the probability that the mean age of a sample of 25 randomly selected doctors is less than 44.32 years.

(c): Why is there a difference in the two answers?

Reference no: EM13615374

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