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The mean lifetime of electric light bulbs produced by a given process was 1500 hours, and the standard deviation is known to be 90 hours.
The mean lifetime of electric light bulbs produced by a given process was 1500 hours, and the standard deviation is known to be 90 hours. A new batch of 11 samples of light bulbs was taken which showed a mean lifetime of 1460 hours. Test at 5% level of significance, whether the mean lifetime
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Essential Partial Differential Equations Analytical And Computational Aspects
Authors: David F Griffiths, John W Dold, David J Silvester
1st Edition
3319225693, 9783319225692
