Solution-Estimate the average life within plus or minus

Estimate the average life within plus or minus

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Reference no: EM132395895

What is the formula for the following problem regarding standard deviation (Quality Management Control):

A testing engineer in a light bulb factory is planning a study to estimate the average life of a large shipment of light bulbs. The engineer wants to estimate the average life within plus or minus 16 hours with 95 percent confidence. Assuming a process standard deviation of 90 hours, determine the sample size for this study.

Reference no: EM132395895

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Estimate the average life within plus or minus

Reference no: EM132395895

Reference no: EM132395895

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