qR2-value measures the percentage of variation in the values of the dependent variable that can be explained by the variation in the independent variable.
qR2-value varies from 0 to 1.
qA value of 0.7654
means that 76.54% of the variance in y can be
explained by the changes in X. The remaining
23.46% of the variation in y is presumed to be
due to random variability.