The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over45 who smoke.

Step 1 of 2:Suppose a sample of484 Americans over45 is drawn. Of these people,344 don't smoke. Using the data, estimate the proportion of Americans over45 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.

Step 2 of 2:Suppose a sample of484 Americans over45 is drawn. Of these people,344 don't smoke. Using the data, construct the85% confidence interval for the population proportion of Americans over45who smoke. Round your answers to three decimal places.