Last updated: October 22, 2026 · Written by the Math Made Easy math teachers
Looking for a random sampling and inferences quiz? Then this Grade 7 quiz on Random Samples and Population Inferences asks 10 multiple-choice questions with instant feedback. This quiz has 10 multiple-choice questions on sampling vocabulary, random versus biased samples, estimates and sampling variation. The wrong options come from common mistakes, such as choosing a convenient sample or giving the share who do not have the trait.
Standards: 7.SP.A.1, 7.SP.A.2 · Level: Grade 7
What this Random Samples and Population Inferences quiz checks
- Population: the whole group; sample: the part actually measured.
- Random samples are fair; biased samples favor some members.
- Estimate = sample proportion × population size.
- Larger random samples tend to vary less.
- Repeated samples of the same size give different results.
The 10 questions of the quiz
- What is a population in statistics?
- Which method gives a random sample of the 600 students in a school?
- In a random sample of 60 shoppers, 15 used a coupon. About 2,000 shoppers visit the store. About how many use coupons?
- Each sample has 20 items. The typical count is 6. About what percent of the population has the trait?
- Which statement about sample size is true?
- A poll is taken only at a bike shop to learn if town residents like biking. Why is it biased?
- A random sample of 150 residents shows that 60 favor a new library. The town has 3,500 residents. About how many favor it?
- A random sample of 6 dogs has these weights in pounds: 18, 22, 25, 20, 23, 24. What is the sample mean?
- Two random samples of the same size from one population give different percents. What is the best explanation?
- Three random samples of 50 students each had 18, 24 and 12 students who walk to school. What percent of the combined sample walk?
After the quiz
Missed a question? Reread the Random Samples and Population Inferences lesson, then take the quiz again. Next, solve the Grade 7 worksheet on Random Samples and Population Inferences, one star first, then two and three stars. Finally, take the chapter test under real conditions, without notes and with a timer.