Question: Calculate the upper and lower limit for the P-chartP-chart TE's Long Life LED light bulbs are designed to have a life of 1120 hours and
Calculate the upper and lower limit for the P-chartP-chart
TE's Long Life LED light bulbs are designed to have a life of 1120 hours and packed in 25-unit packs. The manufacturer tends to set control limits to include 99.73% of the random variation in light bulb manufacturing process when it is in control. 20 packs of a large light bulb manufacturing process were sampled. Use the data for sampled packs in the table below to answer the following questions
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