Question: The Electronic Company produces fuses to protect car radios from too much electrical power. Each day 200 fuses are randomly selected and tested; the results (number of defectives per 200 fuses tested) for 10 consecutive days are as follows:
10, 8, 6, 6, 8, 9, 12, 6, 4, 7
a. Find the upper and lower control limits for a 3-standard deviation for the appropriate control chart.