Free SAT Practice Question

Question 1 of 1
ID: DSAT-RW-II-023
Section: Digital SAT Reading & Writing (RW) - Broadly Reading - Information and Ideas
Topic: Command of Evidence – Quantitative
Difficulty level: Medium

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To evaluate the effects of sleep on mental performance and test their hypothesis that more sleep leads to better cognitive function, researchers split high school students into two groups. One group received 4 hours of sleep before testing, while the other received 8 hours. The following morning, all students completed a standardized academic test and a reaction time activity. The chart shows average results for both groups.

Which choice best describes data in the graph that supports the researchers' hypothesis?

AThe group that slept 4 hours had lower test scores and slower reaction times than the group that slept 8 hours.

BThe average test score for students with less sleep was 70 out of 100, which is still a passing score.

CReaction times were recorded in milliseconds, and test scores were recorded on a 100-point scale.

DBoth groups completed the same tasks, but had different results depending on how much sleep they received.

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