QUESTION 1 (b) As a quality control engineer, you have taken the task to sample 6 lightbulbs every day for the next 21 days and checking the wattage performance of the product produced to look into the process pattern. Show your steps in coming up with a control chart for this sampling. Do you have any comment on the process based from your control chart? Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 105.6 95.6 94.4 102.5 100.5 101.2 94.2 98.5 101.5 92.2 96.5 100.2 115.3 91.5 102.3 99.2 88.6 95.5 92.3 102.5 105.3 93.8 98.6 93.2 100.2 105.6 96.5 99.3 102.3 102.5 96.8 91.6 108.3 108.6 100.5 99.9 91.2 94.3 94.4 90.8 107.5 94.7 Wattage of 6 samples 98.8 102.5 102.9 105.4 95.1 98.8 98.6 99.3 101.7 103.8 95.3 99.6 96.4 99.7 104.8 101.2 99.8 107.6 99.8 91.2 95.5 96.6 102.5 92.3 106.3 109.6 96.3 99.7 98.7 92.5 92.5 89.6 87.4 99.5 92.5 99.6 95.6 91.4 109.3 92.5 107.6 108.3 100.5 106.8 101.5 99.9 106.1 91.1 102.5 107.9 108.9 90.3 105.6 94.6 110.5 98.3 103.5 97.0 92.2 91.3 92.5 96.3 92.3 95.6 109.1 93.3 96.4 102.2 92.5 103.7 103.5 101.6 97.6 95.7 107.5 111.5 99.4 100.2 95.4 90.6 100.5 95.6 91.6 109.6