Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed

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Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours. The best 65% of batteries would last beyond how many hours? Answer correct to 2 decimal places?

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Business Statistics A Decision Making Approach

ISBN: 9780133021844

9th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry

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