The historian of a town with about 1900 households conducts a study to determine the average number of years each family has lived in the town. He randomly selects 1012 addresses from property records and observes a mean of 21.2 years and a standard deviation of 5.1 years of residency for those households. A histogram of the data shows a roughly symmetric curve with one peak. The historian cannot use our procedures to conduct inference on the mean number of years residents have lived in this town because the is too large for this population.