Weakening a Conclusion Regarding Sleep and Test Performance

Very Easy Justify The Conclusion Guarantee Conclusion

In a recent study, researchers found that students who sleep for at least eight hours each night performed better on math tests than those who slept for fewer than eight hours. Consequently, the researchers concluded that getting at least eight hours of sleep guarantees better performance on math tests.

Which of the following, if true, would most seriously weaken the researchers' conclusion?

Many students who sleep for eight hours do not study effectively.

Students who drink caffeinated beverages while studying often perform poorly.

The study did not account for students' levels of motivation.

Some students are able to perform well on math tests after just five hours of sleep.

Students who excel in math typically have a consistent study schedule.

Hint

Submitted4.9K

Correct4.5K

% Correct91%