Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next. To construct a process control chart for the mean number defective, what is the lower control limit?

Question

Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next.  To construct a process control chart for the mean number defective, what is the lower control limit?

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The Answer of Over the last ten days, a manufacturer of cell phones counts the number of defective phones created in each eight-hour shift. The results are shown next.  To construct a process control chart for the mean number defective, what is the lower control limit?

Over the Last Ten Days, a Manufacturer of Cell Phones