An Educational Psychologist Wants to Predict How Well Students Will

Multiple Choice

An educational psychologist wants to predict how well students will do on a particular multiple-choice test based on a measure of their ability to follow instructions. Their actual scores are 3, 7, and 11, and their respective predicted scores are 5, 7, and 9.
-Advanced topic: What is the proportionate reduction in error?

A) (32 - 8) / 32 = 0.75
B) (8 - 32) / 8 = -3
C) 32 / (8 + 32) = 0.80
D) (8 + 32) / 8 = 5