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Confidence Interval Assignment | Professional Writing Services

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February 18th, 2020

A lifetime of inexpensive wristwatches of a sample of 25 watches has a standard deviation of 4.8 months. assume the variance is normally distributed.

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Use the chi-square distribution table to find any chi-square values to three decimal places. round your final answers to one decimal place

find the 90% confidence interval for the variance and standard deviation

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