FIGURE 1.4
Correlation Coefficient
The correlation coefficient (signified by the letter r) is a measure of the relationship between two variables. These graphs represent the three kinds of correlations between Variables X and Y: positive, negative, and no correlation. The sign of r (+ or -) tells us whether the relationship is positive or negative. The absolute value of r tells us the strength of the relationship. The stronger the correlation, the more confidently we can predict the value of one variable from the value of the other.
Correlation Coefficient
The correlation coefficient (signified by the letter r) is a measure of the relationship between two variables. These graphs represent the three kinds of correlations between Variables X and Y: positive, negative, and no correlation. The sign of r (+ or -) tells us whether the relationship is positive or negative. The absolute value of r tells us the strength of the relationship. The stronger the correlation, the more confidently we can predict the value of one variable from the value of the other.