Problem-Solving and Data AnalysisEasyEstimating a population count from a sample proportion
Problem-Solving and Data Analysis practice question
In a random sample of 100 pupils from a school of 500, 60 said they prefer football. Based on the sample, about how many pupils in the whole school prefer football?
Answer: 300
60 out of 100 is 60%, and 60% of 500 is 300.
Common wrong answers
- If you answered 5
- 5 is the ratio of school to sample.
- If you answered 60
- 60 is the number in the sample, not the school.
- If you answered 440
- 440 is 500 − 60.
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