Question

Lisa Monnin is the Director of budgets of nexus Media, Inc. She wants to compare the daily expenses in diets of sales costs of the audit staff, which compiled the following information on the samples. Sales ($) 845 826 827 875 784 809 802 820 829 830 842 832 audit ($) 841 890 821 771 850 859 825 829 if we assume that the population standard deviations are equal and at a level of significance of 0.10, Monnin conclude that means p daily expenses? personal sales are larger than the audit staff? What is the value of p?

Answer 1

Two-Sample T-Test and CI: Sales, Audit

Two-sample T for Sales vs Audit

           N   Mean StDev SE Mean
Sales 12 826.8   22.8      6.6
Audit    8 835.8   34.4       12

Difference = mu (Sales) - mu (Audit)
Estimate for difference: -9.0
90% lower bound for difference: -25.9
T-Test of difference = 0 (vs >): T-Value = -0.71 P-Value = 0.756 DF = 18
Both use Pooled StDev = 27.9123

Since P-value= 0.756>0.10 so we can't conclude that personal sales are larger than the audit staff. Here p=0.756