The mean incubation time for a type of fertilized egg kept at 100.3 F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days?
The probability that a randomly selected fertilized egg hatches less than 21 days is?
The probability that a randomly selected fertilized egg hatches between 19 and 23 days is?
The probability that a randomly selected fertilized egg takes over 25 days to hatch is?