Which statistic quantifies the improvement in ability to predict a person's score when using the regression line rather than the mean?
A) standard error of the estimation
B) standard deviation
C) slope
D) proportionate reduction in error

Question

Quizplus · Accepted Answer

The proportionate reduction in error (PRE) quantifies the improvement in ability to predict a person's score when using the regression line rather than the mean. This statistic compares the error between the predictions based on the regression line and the error based on the mean. A higher PRE indicates a greater improvement in prediction accuracy.

Which Statistic Quantifies the Improvement in Ability to Predict a Person's