The strength of the linear relationship between two numerical variables may be measured by the
A) slope.
B) Y-intercept.
C) coefficient of correlation.
D) scatter diagram.

Question

Quizplus · Accepted Answer

The coefficient of correlation measures the strength and direction of a linear relationship between two numerical variables. The other options are not measures of the strength of the relationship. The slope represents the rate of change in one variable for a unit change in the other variable, the y-intercept represents the value of the dependent variable when the independent variable is zero, and a scatter diagram is a visual representation of the relationship between two variables but does not provide a numerical measure of the strength of the relationship.

The Strength of the Linear Relationship Between Two Numerical Variables