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Table Structure. The product difference test can be applied to tables that contain either no variables or a single variable on the side of the table, and a single variable on the top of the table.
Statistical tests. The product difference test can be run using the column proportions and/or column means test. By default the column proportions test is used.
Attribute combinations. You can use one, two, or three combinations of attributes. If a variable is present on the side of the table, this forms an additional combination, and is used as the inner nest variable; that is, the categories in this variable are changed first as the table rows are built up.
Variable types. Only categorical variables can be used to form the table and the difference attributes.