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QUESTION
Question 1 The quality control manager at a light bulb factory needs to estimate the average life of a large shipment of light bulbs.
Question 1The quality control manager at a light bulb factory needs to estimate the average life of a large shipment of light bulbs. A random sample of 64 light bulbs indicated a sample average life of 300 hours with a sample standard deviation of 100 hours. (a)
