e to search Columbia College- MATH105 Final Exam Page 12 of 14 12/09/2020 10. (5 points) A consulting agency was asked by a large insurance company to investigate if business majors were better salespersons than those with other majors. A sample of 20 salespersons with a business degree showed that they sold an average of 11 insurance policies per week. Another sample of 25 salespersons with a degree other than business showed that they sold an average of 9 insurance policies per week. Assume that the two populations are approximately normally distributed with population standard deviations of 1.90 and 1.25 policies per week, respectively. Con- struct a 99% confidence interval for the difference between the two pop- ulation means.