The correlation coefficient between class attendance and number of problems missed on an exam is -0.77.Which statement regarding this finding is correct?
A) If you start attending class more regularly, the number of problems you miss on the next exam is certain to be increased.
B) There is no causal relationship between the two variables.
C) If you attend class regularly, you are more likely to do well on the exam than someone who does not attend class regularly.
D) The correlation demonstrates causality.

Question

Quizplus · Accepted Answer

The negative correlation coefficient suggests that there is a relationship between the two variables - as one variable (class attendance) increases, the other variable (number of problems missed on an exam) tends to decrease. However, correlation does not imply causation. In other words, attending class regularly may not necessarily cause a student to do well on the exam, but rather, students who attend class regularly may also engage in other behaviors that contribute to their success on the exam (such as studying more actively). Therefore, choice C is the best answer as it represents a statement that accurately reflects the correlation coefficient without making any causal claims.

The Correlation Coefficient Between Class Attendance and Number of Problems