# How to activate an Existing Weight

Any numeric question (Decimal or Integer) can be activated as a weight.

You have two options for how the weight value will be handled:

**Population Weight.**

The value of the variable will be used and the weighted total will be the sum of all of the weights (population)

**Sample Weight.**

The weight values will be normalised so that the weighted total matched the number of records in the data set (sample size)

The following is an example of the normalisation calculation

**(Weight Value / Total of Weight Values) X Number of records**