Business, 01.12.2021 01:50 quoia89

It is known that the standard deviation of the lives of these tubes is 150 150 hours. The company’s research department takes a sample of 100 100 such tubes and finds that the mean life of these tubes is 2250 2250 hours. What is the probability that this sample mean is within 25 25 hours of the mean life of all tubes produced by this company?

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It is known that the standard deviation of the lives of these tubes is 150 150 hours. The company’s...