A random sample of 94 light bulbs had a mean life of x ?587 hours. The standard deviation of the lif


Question: A random sample of 94 light bulbs had a mean life of x ?587 hours. The standard deviation of the lifetime of all such light bulbs is of ? ?36 hours.

It was expected that the mean lifetime of the light bulbs was 600 hours. Do the results contradict expectations? Explain your answer.

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Solution Format: Word Document

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