chi-square: Meaning and Definition of

chi-square

Pronunciation: (kī'skwâr"), [key]
— n. Statistics.
  1. a quantity equal to the summation over all variables of the quotient of the square of the difference between the observed and expected values divided by the expected value of the variable.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.