In order to reduce the amount of CO in exhaust gas of automobiles, seven controllable factors (A-H) are chosen and assigned to Ls as follows. As for noise factors, three road conditions, (R1,R2,R3) are selected. At each road condition and each controllable factor condition, a road test is performed and amount of CO is measured in grams. Expt Controllable Factors CO emission in grams No A B C D F G H R1 R2 R3 1 11111111.04 1.20 1.54 2 111 2 2 2 2 1.42 1.76 2.10 3 1 2 2 1 12 21.01 1.23 1.52 4 1 2 2 2 2 1 1 | 1.50 1.87 2.25 5 21 21 21 21.28 1.34 2.05 6 212 2121 | 1.14 1.26 1.88 7 2 2 1 1221 | 1.33 1.42 2.10 8 2 21 21 1 2 1.33 1.52 2.13 a) Find S/N ratios for CO emissions in each experimental run, Co emission is a smaller-the-better characteristic. b) For S/N data, perform ANOVA. Find significant factors. c) Identify the optimal factor level condition to maximize CO S/N ratio. d) Predict S/N and at optimal factor level condition. In order to reduce the amount of CO in exhaust gas of automobiles, seven controllable factors (A-H) are chosen and assigned to Ls as follows. As for noise factors, three road conditions, (R1,R2,R3) are selected. At each road condition and each controllable factor condition, a road test is performed and amount of CO is measured in grams. Expt Controllable Factors CO emission in grams No A B C D F G H R1 R2 R3 1 11111111.04 1.20 1.54 2 111 2 2 2 2 1.42 1.76 2.10 3 1 2 2 1 12 21.01 1.23 1.52 4 1 2 2 2 2 1 1 | 1.50 1.87 2.25 5 21 21 21 21.28 1.34 2.05 6 212 2121 | 1.14 1.26 1.88 7 2 2 1 1221 | 1.33 1.42 2.10 8 2 21 21 1 2 1.33 1.52 2.13 a) Find S/N ratios for CO emissions in each experimental run, Co emission is a smaller-the-better characteristic. b) For S/N data, perform ANOVA. Find significant factors. c) Identify the optimal factor level condition to maximize CO S/N ratio. d) Predict S/N and at optimal factor level condition