Ms. Lisa Monnin is the budget director for Nexus Media Incorporated. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.


Sales ($) 129 133 147 159 138 143
Audit ($) 124 102 126 140 146 105 139

At the 0.100 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff?

Click here for the Excel Data File


a. State the decision rule. (Round your answer to 3 decimal places.)



b. Compute the pooled estimate of the population variance. (Round your answer to 2 decimal places.)



c. Compute the test statistic. (Round your answer to 3 decimal places.)