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24 votes
The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 33 who smoke. Step 1 of 2: Suppose a sample of 1267 Americans over 33 is drawn. Of these people, 913 don't smoke. Using the data, estimate the proportion of Americans over 33 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.

User TomV
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1 Answer

15 votes
15 votes

Answer:

The estimate for the proportion of Americans over 33 who smoke is 0.28.

Explanation:

Proportion of Americans over 33 who smoke.

Number who smoke divided by the size of the sample.

In this question:

Sample of 1267.

913 don't smoke, so 1267 - 913 = 354 smoke. Then


p = (354)/(1267) = 0.28

The estimate for the proportion of Americans over 33 who smoke is 0.28.

User Snuggles
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