Egg Incubation Times The mean incubation time of

fertilized chicken eggs kept at 100.5F in a still-air incubator is

21 days. Suppose that the incubation times are approximately

normally distributed with a standard deviation of 1 day.

Source: University of Illinois Extension.

(a) Determine the 17th percentile for incubation times of

fertilized chicken eggs.

(b) Determine the incubation times that make up the middle

95% of fertilized chicken eggs.