After 7 months, none of 238 angioplasty patients who received a drug-coated stent to keep their arteries open had experienced restenosis (re-blocking of the arteries).
(a) Use MINITAB to construct a 95 percent binomial confidence interval for the proportion of all angioplasty patients who experience restenosis.
(b) Why is it necessary to use a binomial in this case?
(c) If the goal is to reduce the occurrence of restenosis to 5 percent or less, does this sample show that the goal is being achieved?