Testing Homoscedasticity in a Two-Way Table

Abstract

Shukla (1972, Biometrics 28, 1063-1072) proposed a test of homoscedasticity for a two-way table, which he illustrated by comparing column variances in a 13 X 4 table. In this note it is argued that his method is appropriate only if the number of columns is less than or equal to the number of rows. We offer an alternative that is obtained by modifying Shukla's approach and that can be applied irrespective of the dimensions of the table.