Question

julie finds that the number of hours she sleeps each night is related to the scores she receives on quizzes the next day. as her sleep approaches 8 hours, her quiz scores improve; as her sleep drops to 5 hours, her quiz scores show a similar decline. julie realizes that _______. there is a positive correlation between the number of hours she sleeps and her quiz grades there is a negative correlation between the number of hours she sleeps and her quiz grades her low quiz scores are caused by sleep deprivation the night before a quiz she should sleep about 10 hours a night to ensure 100 percent quiz grades

Explanation:

Positive correlation means as one variable increases, the other increases too. Here, as sleep - hours increase, quiz scores improve, showing a positive relationship. Just because there's a correlation doesn't mean causation (ruling out the sleep - deprivation cause option). Also, no data supports the 10 - hour sleep for 100% scores.

Answer:

there is a positive correlation between the number of hours she sleeps and her quiz grades