Pretend That You Want to Determine the Relationship Between Caffeine

Multiple Choice

Pretend that you want to determine the relationship between caffeine intake and performance on a midterm exam.As students sit down to take the exam, you ask them to write the number of cups of tea, soda, or coffee they ingested two hours prior to the exam.You also obtain their exam scores.You calculate the correlation coefficient between the two variables to be +0.82.What can you conclude?

A) The more caffeine students consumed, the better their scores.
B) Eighty-two percent of the students consumed caffeine prior to the exam.
C) Students with high scores didn't consume caffeine.
D) Students who drink caffeine are smarter than those who don't drink caffeine.