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Management Studies

Q. The lifetime of a certain brand of electric light bulb is known to have a standard deviation of 52 hours. Assume that a random sample of 90 bulbs of this brand has a mean lifetime of 494 hours. Find out a 90% confidence interval for the true mean lifetime of all light bulbs of this brand. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

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Business Management, Management Studies

Category:- Business Management
Reference No.:- M9379106

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