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The column proportions test looks at the rows of a table independently and compares pairs of columns, testing whether the proportion of respondents in one column is significantly different from the proportion in the other column. The proportion is the count in the cell divided by the base for the column.
IBM® SPSS® Data Collection Survey Reporter automatically assigns a one-character ID to each column in the test. When there is a difference between any pair of proportions at the chosen significance level, Survey Reporter displays the ID of the column that contains the smaller proportion below the cell contents of the cell that contains the larger proportion.
Note: Column IDs are only applied to visible table elements. Hidden elements are not taken in consideration when defining a Column IDs as a string.