An investigator measures 200 subjects on some variable and selects the 10 subjects who have the highest scores. The mean score for these 10 subjects is 130. If the investigator measured these 10 subjects again on the same variable, what would be the likeliest value of the mean of the second 10 measurements?
A) Less than 130
B) 130
C) More than 130
D) Cannot tell from information provided

Question

Quizplus · Accepted Answer

This scenario describes regression to the mean, where extreme scores tend to be closer to the average upon retesting. Thus, the mean of the second measurements is likely to be less than 130.

An Investigator Measures 200 Subjects on Some Variable and Selects