When either the row or column totals in a contingency table are fixed, the test of independence of classifications becomes a test of the homogeneity of cell probabilities for several multinomial experiments.

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This statement is true. When either the row or column totals in a contingency table are fixed, the test of independence becomes a test of the homogeneity of cell probabilities, which essentially means testing if the proportions of outcomes in each cell are the same across different groups or conditions. This can be conceptualized as testing the homogeneity of several multinomial experiments.

When Either the Row or Column Totals in a Contingency