Use this field to select variables that distinguish groups of columns. Distinct statistical imputations are made for each unique combination of the values of these variables.All of the variables in the specified experimental design data set are listed in the Available Variables field.

Highlight variable(s) in the Available Variables field.

Click to add the highlighted variables to the Variables Defining Groups field.Note : If you leave this field blank , a single imputation statistic is computed for each row.