10.35 A survey was conducted to determine the difference between the annual salaries of employees with and without a college degree. For a sample of 115 employees with a college degree, the mean salary per year was

£45,248, and the sample standard deviation was £10,974.

For a sample of 102 employees without a degree, the mean annual salary per year was £37,024, and the sample standard deviation was £26,852. Test the null hypothesis, at the 5% level, that the population means are equal against the alternative that the mean annual salary is higher for employees with a college degree.