Joe uses age, family size, and income to predict scores on a survey of happiness. The results were statistically significant with a coefficient of determination of 64%. He collects a new sample and examines the regression equation. In Joe's second sample, the common variance will likely ________ due to ________.
◦ decrease, shrinkage
◦ increase, regression.
◦ increase, replication
◦ decrease, attenuation