Based on data from a large study of healthy infants in six countries, the world health organization produced growth charts that are part of every pediatrician’s toolkit for monitoring a child’s overall health. according to the who report, girls who are one month old have a mean head circumference of 36.6 centimeters with a standard deviation of 1.2 centimeters. as with most body measurements, head circumference has a normal probability distribution. medscape defines microcephaly (small head syndrome) as a head circumference that is more than two standard deviations below the mean. what is the probability that a one-month old girl will be categorized as having microcephaly?