The incubation time for Rhode Island Red chicks is normally distributed 27 days and standard deviation of approximately 3 days. If 1000 eggs are incubated, how many chicks do we expect will hatch in 27 to 33 days?

1 Answer
Will
Sep 12, 2016

340

Explanation:

#68%# probability lies between 2 standard deviations from the mean of a standard normal distribution. This goes both ways from 0. 27 to 33 is +2 from the mean so we assume #.68/2 = 34%# should be the probability of hatching. The expected amount should be #p(x)x = 1000*.34 = 340#

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