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Lifetimes of Wristwatches A random sample of the lifetimes of 28 inexpensive wristwatches has a standard deviation of 4.9 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. Part: 0/2 Part 1 of 2 Find the 95% confidence intervals for the variance and standard deviation..

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Lifetimes of Wristwatches A random sample of the lifetimes of 28 inexpensive wristwatches has a standard deviation of 4.9 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. Part: 0/2 Part 1 of 2 Find the 95% confidence intervals for the variance and standard deviation.

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