Question

the following data represents the pH of rain for 12 days. a normal prob plot suggests data could come from a population that is normally distributed. a boxplot indicates there are no outliers. the sample standard deviation is s=0.322. construct and interpret a 99% confidence interval for the standard dev.

4.60

5.67

5.21

4.68

4.96

5.13

4.77

4.71

4.85

4.70

4.68

4.55

a. if repeated samples are taken, 99% of them will have the sample standard deviation will be between _ and _.

b. there is 99% confidence that the population standard deviation is between _ and _

c. there is a 99% prob that the true population between is between _ and _

Answer 1