Question

malia investigates the relationship between caffeine intake and performance on a class test for high school students. before the sample group of students takes an exam, malia notes the number of cups of coffee they consumed within two hours before the test. malia obtains the students scores after the test is over. she then calculates the correlation coefficient between the two variables and finds it to be +0.82. which of the following conclusions should be drawn from this value? multiple choice higher caffeine consumption is related to higher exam scores. caffeine consumption has no association with performance on a test. eighty - two percent of the students consumed caffeine prior to the exam. caffeine consumption causes higher scores.

Explanation:

A positive correlation coefficient (+0.82) means as one variable (caffeine intake) increases, the other (exam scores) tends to increase. But correlation doesn't imply causation.

Answer:

Higher caffeine consumption is related to higher exam scores.