Where is the proportion in the total sample and is the proportion in the sub-group, and are their respective effective sample sizes, and is the proportion of the total population in sub-group :
- , or, if Weights and significance is set to Un-weighted sample size in tests (see Weights, Effective Sample Size and Design Effects),
- is 1 if Bessel's correction is selected for Proportions in Statistical Assumptions and 0 otherwise,
- is Extra Deff, and
- is the proportion of the Population represents by the sub-group.