WEIGHT subcommand is optional and must appear before
TABLE. If it appears, it must name a numeric variable, known
as the effective weight or adjustment weight. The
effective weight variable stands in for the dictionary’s weight
variable (see WEIGHT), if any, in most calculations in
CTABLES. The only exceptions are the
VALIDN summary functions, which use the
dictionary weight instead.
Weights obtained from the PSPP dictionary are rounded to the nearest integer at the case level. Effective weights are not rounded. Regardless of the weighting source, PSPP does not analyze cases with zero, missing, or negative effective weights.