Question

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 ($) 129 133 147 159 138 143 Audit ($) 122 103 127 136 149 120 142 At the 0.050 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

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

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

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

Answer 1

1)

Decision rule :                   reject Ho if test statistic t>1.796

2)

pooled estimate of the population variance=182.29

3)

test statistic t =1.740

fail to reject Ho