Problem 4 The effect of ve different ingredients (A, B, C, D, E) on the reaction time of a chemical process is being studied. Each batch of new material is only large enough to permit ve runs to be made. Furthermore, each run requires approximately 1.5 hours, so only ve runs can be made in one day. The experimenter decides to run the experiment as a Latin square so that day and batch effects may be systematically controlled. She obtains the data that follow. - nan-mm (b) Check Normality and Homogeneity of Variance assumptions. (can use plots or tests)