When a common regression line for two groups is used to predict performance, but the individual regression lines for the groups differ where they cross the y-axis, which one of the following types of predictive bias is present?
A) method bias
B) construct bias
C) slope bias
D) intercept bias

Question

Quizplus · Accepted Answer

The difference in the points where the individual regression lines for the two groups cross the y-axis indicates that the intercepts of the lines are different. This results in intercept bias, where the predictions for one group may be systematically higher or lower than the predictions for the other group, even if they have the same level of predictor variable.

When a Common Regression Line for Two Groups Is Used