Four points each - Total 16 points 1. In order to assess if the three ovens perform differently, check if there is a statistically significant difference among after-oven dirt for the three ovens. 2. To see if average dirt count varies depending on days of the week when trucks are painted, compare the dirt counts for the five days of the week. 3. Check whether and how average temperature and average humidity together affect percentage of vehicles not needing paint repairs. 4. A. Based on those of your results from questions 1 through 3 that turn out to be statistically significant, provide your hypotheses for drilling down to another layer of root causes. Advise Michael Ling on what he may do to try and reduce dirt in paint. B. In addition to the factors covered in questions 1 through 3, what other factors mentioned in the case should Michael Ling consider as potential causes for dirt in the paint? HE_Mod7_TA2_Data _ItsADirtyJob_DataInExcel.xlsx