Question

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=0.325.

Construct and interpret a

95​%

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

4.61	5.06	5.04	4.76	4.77	4.74
5.76	4.70	5.08	4.79	4.67	4.59

There is

95​%

confidence that the population standard deviation is between

nothing

and

nothing.

B.There is a

95​%

probability that the true population standard deviation is between

nothing

and

nothing.

C.If repeated samples are​ taken,

95​%

of them will have the sample standard deviation between

nothing

and

nothing.

Answer 1