Random Sampling and Inferences Quiz – Grade 7 (10 Questions)

Last updated: October 22, 2026 · Written by the Math Made Easy math teachers

Standards: 7.SP.A.1, 7.SP.A.2 · Level: Grade 7

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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

1. What is a population in statistics?
2. Which method gives a random sample of the 600 students in a school?
3. In a random sample of 60 shoppers, 15 used a coupon. About 2,000 shoppers visit the store. About how many use coupons?
4. Each sample has 20 items. The typical count is 6. About what percent of the population has the trait?
5. Which statement about sample size is true?
6. A poll is taken only at a bike shop to learn if town residents like biking. Why is it biased?
7. A random sample of 150 residents shows that 60 favor a new library. The town has 3,500 residents. About how many favor it?
8. A random sample of 6 dogs has these weights in pounds: 18, 22, 25, 20, 23, 24. What is the sample mean?
9. Two random samples of the same size from one population give different percents. What is the best explanation?
10. 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.

Mis à jour le 22 October 2026