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

Sales ($)127 137140 159 136 138Audit ($)123 102 128 143 153 127 131

The population standard deviations are unknown but assumed to be equal. At the 0.050 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff?

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Required:

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.)