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Lifetimes of Wristwatches A random sample of the lifetimes of25 inexpensive wristwatches has a standard deviation of4.8 months. Assume the variable is normally distributed. Use

Lifetimes of WristwatchesA random sample of the lifetimes of25 inexpensive wristwatches has a standard deviation of4.8 months. Assume the variable is normally distributed. 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 the98% confidence intervals for the variance and standard deviation.

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