Find ninrty five confidence interval for population mean

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Reference no: EM13127710

The batteries used in a digital watch have an operating life that is normally distributed. A sample of 16 batteries reveals a mean of 3.45 years and a standard deviation of 0.3 years.

1. Find a 95% confidence interval for the population mean.

2. find a 90% confidence interval for the population mean.

Reference no: EM13127710

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