# Homework question that has to do with SD

**Question description**

A regional sales manager chooses two similar offices to study the effectiveness of a new training program aimed at increasing sales. One office institutes the training program and the other does not. (Assume that the office staffs are independent of one another). The office that does not institute the training program, office 1, has 31 sales people. The mean sales person over the next month for office 1 turns out to be $3197, with a standard deviation of $102. Office 2, the office that does institute the training program, has 41 sales people; and the mean sales per person over the next month turns out to be $3229, with a standard deviation of $107.

a. at the 5% significance level, does the data provide sufficient evidence to conclude that the training program increases mean sales?

b. use the data given on the previous page to test the conjecture that there is more variability for the sales amounts in office 2, with the training, than there is in office1, without the training. use a 5% significance level.

## Tutor Answer

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors