1. Starting annual salaries for individuals with master's and bachelor's degrees were collected in two independent random samples. The average starting salary of a random sample of 24 individuals with master's degrees showed a mean of $45,000 with a standard deviation of $4,000, while a random sample of 15 individuals with bachelor's degrees showed a mean starting salary of $35,000. Test at a 0.05 level of significance if those with master's degrees had a significantly higher average starting salary than those individuals with bachelor's degrees. Assume that the population standard deviation of the starting salary for the two populations are equal.