Free SAT Evaluating statistical claims practice questionsdigital SAT, 2026 format
What a study's design lets you conclude: random sampling, random assignment, and the difference between association and cause.
Answer each question, then read why the right answer is right and why the tempting one is wrong.
Question 1
A researcher wants to determine whether a new study app improves students' test scores. She recruits 200 volunteers, randomly assigns half to use the app for a month and half not to, and then compares their scores. Which statement about the conclusions that can be drawn is most appropriate?
Question 2
A researcher selected 100 tomato plants from one greenhouse and randomly assigned half to receive fertilizer A and half to receive fertilizer B. After 6 weeks, the plants that received fertilizer A were, on average, significantly taller. Which conclusion is best supported by the study?
Question 3
A researcher surveyed a random sample of 500 adults in a city about their weekly exercise and their stress level, rated from 1 to 10. The bar graph shows the results. Which statement is best supported by the survey?
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