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Selecting columns to test
For the column proportions and column means tests, by default columns are tested in groups that are determined by the structure of the table. For example, in a table with three categories in the column variable, columns would be labeled A, B, and C, and the test would be carried out on all combinations of columns A-C. In nested tables, the columns of the inner nest level are repeated (and given unique IDs), and the test is carried out for each set of columns within the nesting level.
See also
TestColumns property
ColumnsID property
Statistical tests