A proportion, p, that many public opinion polls estimate is the number of Americans who would say yes to the question, “If something were to happen to the president of the United States, do you think that the vice president would be qualified to take over as president?” In one such random sample of 1022 adults, 388 said yes.
(a) On the basis of the given data, find a point estimate of p.
(b) Find an approximate 90% confidence interval for p.