The mean incubation time for a type of fertilized egg kept at 100.8 degrees is 19 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days.
What is the probability that a randomly selected fertilized egg hatches in less than 15 days?
What is the probability that a randomly selected fertilized egg takes over 23 days to hatch?
What is the probability that a randomly selected fertilized egg hatches between 17 and 19 days is?
would it be unusual for an egg to hatch in less than 13 days? why?