The two pieces of information obtained from a correlation coefficient are
A) the extent of external validity and internal validity of a study.
B) interobserver reliability and percent agreement between two observers.
C) the direction and strength of the relationship between two variables.
D) the predictive relationship and the causal inference between two variables.

Question

Quizplus · Accepted Answer

The correlation coefficient provides information about two variables' relationship in terms of direction (positive or negative) and strength (weak, moderate, or strong). It does not provide information on external or internal validity, interobserver reliability, percent agreement, predictive relationship, or causal inference.

The Two Pieces of Information Obtained from a Correlation Coefficient