Lifestyle: Smoking In a survey of 1000 large corporations, 250 said that, given a choice between a job candidate who smokes and an equally qualifi ed nonsmoker, the nonsmoker would get the job (USA Today).

(a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p.

(b) Find a 0.95 confi dence interval for p.

(c) Interpretation As a news writer, how would you report the survey results regarding the proportion of corporations that hire the equally qualifi ed nonsmoker?

What is the margin of error based on a 95% confi dence interval?