The Coefficient of Determination for a Regression Model Based on Group Data.

In this paper, the coefficient of determination for grouped data is defined as the proportion of between group variation in y that is explained by the regression. This measure is demonstrated to be superior to the one commonly used. A numerical illustration presented in the paper is based on the National Sample Survey data on consumer expenditure for the year 1983, covering the entire rural area of India. Copyright 1993 by Blackwell Publishing Ltd