Problem-Solving and Data AnalysisEasy–MediumEstimating a population from a random sample
Problem-Solving and Data Analysis practice question
In a random sample of 60 residents of a town of 2,000, 18 said they had visited the new library. Based on the sample, about how many of the town's residents have visited the library?
Answer: 600
18/60 = 30%, and 30% of 2,000 is 600.
Common wrong answers
- If you answered 18
- 18 is the sample count.
- If you answered 33
- 33 divides 2,000 by 60.
- If you answered 1400
- 1400 is the number who have not visited.
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