You are interested in finding a
a) To compute the confidence interval use a t or z distribution.
c) If many groups of 14 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.
Give a counter example to the statement
that X and Y are independent.