Question

It has been suggested that residents in the rural areas of the South have a different life-span than in the North. In a random sample of 50 residents of the rural South, the mean life span was 75.9 with a sample standard deviation of 9.8. A random sample of 75 residents of the North, the mean life span was 82.4 with a sample standard deviation of 6.1. Is the sample evidence strong enough to claim that those in the South have shorter or longer lives? Use a significance level of 5%.Use a test statistic

Answer 1