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 _____ correlation between her hours of sleep and her grades.
A) negative
B) positive
C) neutral
D) causative
Correct Answer:
Verified
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