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. 131 135 146 165 136 142 Sales ($) Audit ($) 130 102 129 143 149 120 139 At the 0.10 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.) Reject HO if b. Compute the pooled estimate of the population variance. (Round your answer to 2 decimal places.) Pooled variance C. Compute the test statistic. (Round your answer to 3 decimal places.) Value of the test statistic X This is a numeric cell, so please enter d. State your decision about the null hypothesis. Reject Ho: US SHA Do not reject Ho: MS SUA e. Estimate the p-value. etween 0.01 And 0.025 Between 0.05 And 0.10 Between 0.05 And 0.1

Answer 1

a) Decision rule: Reject HO if t > 1.363 b) Pooled variance = 204.08 c) Value of the test statistic = 1.537 d) Decision: Reject Ho: ls <LIA e) The p-value: Between 0.05 and 0.10

t-Test: Two-Sample Assuming Equal Variances Sales 142.5 149.9 Audit 130.286 249.238 6 7 204.08 0 Mean Variance Observations Pooled Variance Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail 11 1.537 0.076 1.363 0.153 1.796