How do you compute

A personnel director in a particular state claims that the mean annual income is greater in one of the state's counties (county A) than it is in another county (county B). In County A, a random sample of 14 residents has a mean annual income of $42,400 and a standard deviation of $8700. In County B, a random sample of 13 residents has a mean annual income of $39,800 and a standard deviation of $5200. At = 0.05, answer parts (@) through (e). Assume the population variances are not equal. If convenient, use technology to solve the