3) A factory produces batteries that have a lifetime that is approximately normally distributed with a standard

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3) A factory produces batteries that have a lifetime that is approximately normally distributed with a standard deviation of 40 hours. If a sample of 30 batteries has an average lifetime of 720 hours, find a 97% confidence interval for the population mean of all batteries produced by this factory. Sol: 704.152

Posted Date: Jun 21, 2024 11:07 PM

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3) A factory produces batteries that have a lifetime that is approximately normally distributed with a standard

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