Question 1
A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary. The sample information is submitted to MINITAB with the following results:
Analysis of Variance
Source DF SS MS F P
Factor 3 32.33 10.78 2.36 0.133
Error 10 45.67 4.57
Total 13 78.00
At the .05 level of significance, is there a difference in the mean number of months before a raise was granted among the four CPA firms?
Question 2
Davis Outboard Motors, Inc. recently developed an epoxy painting process for corrosion protection on exhaust components. Bill Davis, the owner, wishes to determine whether the lengths of life for the paint are equal for three different conditions: salt water, fresh water without weeds, and fresh water with a heavy concentration of weeds. Accelerated-life tests were conducted in the laboratory, and the number of hours the paint lasted before peeling was recorded.
Salt Water Fresh Water Fresh Water with Weeds
167.3 160.6 182.7
189.6 177.6 165.4
177.2 185.3 172.9
169.4 168.6 169.2
180.3 176.6 174.7
Use the Kruskal-Wallis test and the .01 level to determine whether the lasting quality of the paint is the same for the three water conditions.
Please show work in a word document.