regression toward the mean

NOUN
26 LETTERS · STARTS WITH R

regression toward the mean is a valid 26-letter word worth 33 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1G2R1E1S1S1I1O1N1T1O1W4A1R1D2T1H4E1M3E1A1N1
1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 4 + 1 + 1 + 2 + 0 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 1 =33 PTS
DOUBLE WORD → 66TRIPLE WORD → 99
MEANING

What does regression toward the mean mean?

NOUN · 1 SENSE
1

The relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x).