Problem-Solving and Data AnalysisEasyEstimating a school total from a random sample
Problem-Solving and Data Analysis practice question
In a random sample of 150 students from a school of 900, 30 said they cycle to school. Based on the sample, about how many of the school's students cycle to school?
Answer: 180
30/150 = 1/5, and 1/5 of 900 is 180.
Common wrong answers
- If you answered 6
- 6 divides 900 by 150.
- If you answered 30
- 30 is the sample count.
- If you answered 270
- 270 uses 30% instead of 20%.
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