Question

You are interested in finding a 95% confidence interval for the mean number of visits for physical therapy patients. The data below show the number of visits for 11 randomly selected physical therapy patients. Round answers to 3 decimal places where possible.

15

6

10

23

8

19

27

18

28

6

17

a. To compute the confidence interval use a___distribution.

b. With 95% confidence the population mean number of visits per physical therapy patient is between___and___visits.

c. If many groups of 11 randomly selected physical therapy patients are studied, then a different confidence interval would be produced from each group. About___percent of these confidence intervals will contain the true population mean number of visits per patient and about___percent will not contain the true population mean number of visits per patient.

Answer 1