For 5459 pregnant women using Aarhus University Hospital in Denmark in a two-year period who reported information on length of gestation until birth, the mean was 281.9 days, with standard deviation 11.4 days. A baby is classified as premature if the gestaion time is 258 days or less.
a. if gestation times are normally distributed, what proportion of babies would be born prematurely?
b. The actual proportion born prematurely during this period was 0.036. Based on ths information, how would you expect the distribution of gestation time todiffer from normal?