Problem-Solving and Data AnalysisEasyWhat a random sample supports
Problem-Solving and Data Analysis practice question
A random sample of 500 adults in a city was surveyed, and 40% of them said they cycle at least once a week. Which of the following conclusions is best supported by the survey?
- A. About 40% of all adults in the city cycle at least once a week.Correct
- B. Exactly 40% of all adults in the city cycle at least once a week.
- C. About 40% of all adults in the country cycle at least once a week.
- D. Exactly 500 adults in the city cycle at least once a week.
Answer: A. About 40% of all adults in the city cycle at least once a week.
A random sample supports an approximate estimate for the population it was drawn from.
Why the other answers are wrong
- B. Exactly 40% of all adults in the city cycle at least once a week.
- A sample cannot give an exact population figure.
- C. About 40% of all adults in the country cycle at least once a week.
- The sample was drawn from one city, not the country.
- D. Exactly 500 adults in the city cycle at least once a week.
- 500 is the sample size, not a count of cyclists.
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