The operations manager for an appliance manufacturer wants to determine the optimal length of time for the washing cycle of a household clothes washer. An experiment is designed to measure the effect of detergent brand and washing cycle time on the amount of dirt removed from standard household laundry loads. Four brands of detergent (A,B,C,D) and four levels of washing cycles (18, 20, 22, and 24 minutes) are specically selected for analysis. 32 standard household laundry loads (having equal weight and dirt) are randomly assigned to the 16 detergentwashing cycle time combinations. The results (in pounds of dirt removed) are: Washing Cycle Time (in Minutes) Brand 22 24 009 0.13 0-. 19 0.18 0.12 0.17 0.19 .15 0.08 0.18 0.2 13 0.09 0. 0.17 0.17 0.17 0.16 Perform a "['woway Analysis of Variance with Replication in Excel and output the AN OVA table assuming a 5% level of signicance. Which washing cycle times do NOT show a signicant different results (at alpha = 0.05) in the pounds of dirt removed? Perform the multiple comparisons procedure, Fisher's LSD, by hand to determine the result. Select all answers that apply. 18 and 20 minutes 18 and 22 minutes 18 and 24 minutes : 20 and 22 minutes 20 and 24 minutes 22 and 24 minutes