Data set: Towels2
a. In fact, three brands of paper towels were actually tested with three amounts of water. The data for the complete study are provided in Towels2. Write a statistical model corresponding to this data set.
b. Conduct an ANOVA on the Towels2 data set. Transform the data if appropriate. Explain any changes from the degrees of freedom and sum of squares values found in Question 36. Create main effects and interaction plots and use the p-values to state your conclusions.