Sampling, margin of error, and claims
Probability and inference · Stage 3
Recognize the pattern
A sample statistic estimates the matching population parameter.
Useful ruleSample statistic estimates population
Build on: PSD-04
Try it before reading the solution
A random sample of 200 voters shows 55% support. What population quantity is estimated?
This teaching example is original and is not an official SAT question.
Reasoning
The 55% sample proportion estimates the population support proportion.
AnswerThe proportion of all voters who support it
03 · Next step
See membership →Ready for adaptive practice
Practice questions remain in English, as on the SAT.