Quiz 8 

5. 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=0.330.

Construct and interpret a 95​% confidence interval for the standard deviation pH of rainwater in this region.

Select the correct choice below and fill in the answer boxes to complete your choice.  ​(Use ascending order. Round to three decimal places as​ needed.)

1. There is a 95​% probability that the true population standard deviation is between ___ and ____
2. If repeated samples are​ taken, 95​% of them will have the sample standard deviation between ___ and ___
3. There is 95​% confidence that the population standard deviation is between ___ and _____