Confidence interval for variance of heights of maple trees
Find the 95% confidence interval for the variance of the heights of maple trees if a sample of 21 trees has a standard deviation of 8.2 feet.
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A study of peach trees found that the average number of peaches per tree was 825. The standard deviation of the population is 70 peaches per tree. A scientist wishes to find the 95% confidence interval for the mean number of peaches per tree.
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