In many states, lawyers are encouraged to do pro bono work by both their firms and judicial advisory councils. However, in recent years lawyers have been devoting more time to their paying clients and less time to pro bono legal aid. Independent random samples of lawyers from two large firms were obtained, and the number of pro bono hours for the past year was recorded for each lawyer. The summary statistics are given in the table.Assume the underlying populations are normal, with equal variances.

Law firm Sample size Sample mean Sample variance Dewey, Cheatum, & Howe 26 75.1 5.92 Fine, Howard, & Fine 26 80.9 5.65