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Mathematics, 04.12.2019 20:31 jojo8617
Life tests performed on a sample of 13 batteries of a new model indicated:
(1) an average life of 75 months, and
(2) a standard deviation of 9 months. other battery models, produced by similar processes, have normally distributed life spans. the 90% confidence interval for the population mean life of the new model is:
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Life tests performed on a sample of 13 batteries of a new model indicated:
(1) an aver...
(1) an aver...
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