(Answered) The mean incubation time for a type of fertilized egg kept

Statistics

The mean incubation time for a type of fertilized egg kept at 100.5°F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day.

(a) What is the probability that a randomly selected fertilized egg hatches in less than 21 days?

(b) What is the probability that a randomly selected fertilized egg hatches between 22 and 23 days?

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