Question

You are interested in finding a 90% 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.

17 11 23 5 27 19 17 24 6 16 6

a. To compute the confidence interval use a(z or t) distribution.

b. With 90% 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

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