Use the one-proportion z-interval procedure to find the required confidence interval. Be sure to check the conditions for using that procedure.
Drinking Habits. A Reader's Digest/Gallup Survey on the drinking habits of Americans estimated the percentage of adults across the country who drink beer, wine, or hard liquor, at least occasionally. Of the 1516 adults interviewed, 985 said that they drank.
(A) Determine a 95% confidence interval for the proportion, p, of all Americans who drink beer, wine, or hard liquor, at least occasionally. Interpret your result.
(B) Interpret your results from part a.