[See Steps] Lifetimes of snowmobiles A random sample of 15 snowmobiles was selected. and the lifetime (in months) of the batteries was measured. The variance
Question: Lifetimes of snowmobiles A random sample of 15 snowmobiles was selected. and the lifetime (in months) of the batteries was measured. The variance of the sample was $8.6$. Find the \(90 \%\) confidence interval of the true variance.
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