Problem-Solving and Data AnalysisEasy–MediumWhat a sample percentage is
Problem-Solving and Data Analysis practice question
A poll of 800 randomly selected voters in a city found that 62% of them support a new park. Which of the following best describes this 62%?
- A. An estimate, based on the sample, of the percentage of all the city's voters who support the park.Correct
- B. The exact percentage of all the city's voters who support the park.
- C. The percentage of voters who refused to answer the poll.
- D. The poll's margin of error.
Answer: A. An estimate, based on the sample, of the percentage of all the city's voters who support the park.
The 62% is a sample statistic. It estimates the population percentage; only a survey of every voter could give the exact figure.
Why the other answers are wrong
- B. The exact percentage of all the city's voters who support the park.
- A sample can't give the exact population value; that would need every voter.
- C. The percentage of voters who refused to answer the poll.
- Non-response is a different quantity and isn't reported here.
- D. The poll's margin of error.
- The margin of error is the uncertainty around the 62%, not the 62% itself.
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