Problem-Solving and Data AnalysisEasy–MediumEstimating support from a sample
Problem-Solving and Data Analysis practice question
In a random sample of 200 voters in a town, 120 support a new measure. Based on the sample, what is the best estimate of the number of the town's 5,000 voters who support the measure?
Answer: 3000
120/200 = 0.6, and 0.6 × 5,000 = 3,000.
Common wrong answers
- If you answered 120
- 120 is the sample count.
- If you answered 600
- 600 multiplies by 5 instead of 25.
- If you answered 2000
- 2,000 uses the 80 who do not support it.
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