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...

The following data represent the pH of rain for a random sample of

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

Construct and interpret a

confidence interval for the standard deviation pH of rainwater in this region.