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 15 randomly selected physical therapy patients. 12 13 8 13 19 20 11 8 13 25 18 14 20 6 14 a. To compute the confidence interval use a t v y distribution. b. With 95% confidence the population mean number of visits per physical therapy patient is between and visits. Enter an integer or decimal number, accurate to at least 3 decimal places [more..] c. If many groups of 15 randomly selected physical therapy patients are studied, then a different confidence interval would be produced from each group. About 95 percent of these confidence intervals will contain the true population mean number of visits per patient and about 5 percent will not contain the true population mean number of visits per patient