Probability

Question

The incubation time of Rhode Island Red chicks is normally distrubuted with a mean of 23 days and standard deviation of approximately 2 days. If 1000 eggs one being incubated, how many chicks do we expect will hatch in 17 to 27 days?

A) 976 B) 21 C)819 D)499

Answer 1

P(-2<z<2) = 0.9544 so when we multiply this by 1000, I get 955.