Question

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 4040 who smoke.

Step 1 of 2: Suppose a sample of 2172 Americans over 40 is drawn. Of these people, 390 smoke. Using the data, estimate the proportion of Americans over 40 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.

Step 2 of 2: Suppose a sample of 2172 Americans over 40 is drawn. Of these people, 390 smoke. Using the data, construct the 98% confidence interval for the population proportion of Americans over 40 who smoke. Round your answers to three decimal places.

Answer 1