Correlation Matrix

The correlation matrix displays attributes, attributes values (in the case of discrete attributes), and correlations between customer and products. Each cell in the matrix provides a visual indication of how attributes are correlated, along with the correlation value. Various colors indicate the strength of the correlation among attributes, with -1 and 1 indicating strong association.

Table 5-15 shows the strength of the correlation for the different ranges of values for the correlation coefficient.

Table 5-15 Correlation Coefficient Values

Correlation Coefficient Value	Strength of Relationship
1.0 to 0.5	Strong
0.3 to 0.5	Moderate
0.1 to 0.3	Weak
-0.1 to 0.1	None or very weak
-0.3 to -0.1	Weak
-0.5 to -0.3	Moderate
-1.0 to -0.5	Strong