A drugstore considers a wait of more than 5
minutes to be a defect. Each week...
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A drugstore considers a wait of more than 5minutes to be a defect. Each week 100 customers are randomlyselected and timed at the checkout line. The numbers of defects for20 consecutive weeks are given below.
4 4 5 5 5 5 5 6 6 6 6 12 6 6 6 7 6 7 8 7
Find the correct lower control limit
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