Question: Are young woman delaying marriage and marrying at a later age? This question was addressed in a report issued by the Census Bureau (Associated Press, June 8, 1991). The report stated that in 1970 (based on census results) the mean age of brides marrying for the first time was 20.8 years, and its standard deviation is 6.44. In 1990 (based on the sample, since census results were not yet available) the mean was 23.9. Suppose that the 1990 sample mean had been based on a sample of size 100. Is it reasonable to think that the distribution of age at first marriage is normal in shape?