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 box plot indicates there are no outliers. The sample standard deviation is s= 0.037. Construct an interpret a 95% confidence interval for the standard deviation pH of rainwater in the region.

4.59 5.23 4.96, 4.70 4.82, 4.68, 5.68, 4.79, 4.99, 4.83, 4.65

There is a 95% chance that the true population standard deviation is between __ and ____.

There is a 95 % confidence that the population standard deviation is between ____ and _____.

If repeated samples are taken, 95% of them will have the sample standard deviation between ___ and _____.