If COL and ROW specifications are missing then the following default layouts are used: If there are at most one object variable then the first grouping va- riable is treated as a column variable and the second grouping variable as a row variable. All other grouping variables are considered as background variables. If there are more than one object variable then the object variables define the columns and the first grouping variable the rows. The other grouping variables are handled as background variables, i.e one table is produced for each combination of the values of the background variab- les. Example: Computing a two-way table for means, deviations and cell frequencies using default layout: MTAB IEADATA,END+2 VARIABLES=Knowldge GROUPING=Attitude,Sex The table produced by the MTAB operation: Means, Deviations and Frequencies Attitude Attitude Attitude Attitude 1.000 2.000 3.000 Total Knowldge Knowldge Knowldge Knowldge Sex 1.000 M 93.000 73.579 56.636 74.162 D 35.162 34.096 32.825 35.065 N 12 57 11 80 2.000 M 60.400 70.674 52.211 64.929 D 25.813 28.191 32.259 29.940 N 5 46 19 70 Total M 83.412 72.282 53.833 69.853 D 35.370 31.480 31.971 32.991 N 17 103 30 150 Further information: M = More information on MTAB operation