The Newport Diner records the times (min) it takes before customers are asked for their order. Each day, 50 customers are randomly selected and the order is considered to be defective if it takes longer than three minutes. The numbers of defective orders are listed below for consecutive days. Construct an appropriate control chart and determine whether the process is within statistical control. If not, identify which criteria lead to rejection of statistical stability.
3 2 3 5 4 6 7 9 8 10 11 9 12 15 17
Refer to the amounts of energy consumed in the author's home. (Most of the data are real, but some are fabricated.) Each value represents energy consumed (kWh) in a two-month period. Let each subgroup consist of the six amounts within the same year.

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