The following data represent the pH of rain for a random sample of 12 rain dates in a particular region. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. The sample standard deviation is s=0.345. Construct and interpret a 95​% confidence interval for the standard deviation pH of rainwater in this region. 4.50 5.12 4.96 4.89 4.67 4.69   5.82 4.87 5.11 4.84 4.74

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