The American Heart Association is about to conduct an antism

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 43 who smoke. Step 1. Suppose a sample of 383 Americans over 43 is drawn. Of these people, 269 don’t smoke. Using the data, estimate the proportion of Americans over 43 who smoke. Step 2. Suppose a sample of 383 Americans over 43 is drawn. Of these people, 269 don’t smoke. Using the data, construct the 80% confidence interval for the population proportion of Americans over 43 who smoke. Lower bound: Upper bound:

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