IBM SPSS COMPLEX SAMPLES 19 manual Analysis Preparation Wizard Size

Inclusion Probabilities

23

Preparing a Complex Sample for Analysis

Analysis Preparation Wizard: Size

Figure 3-4

Analysis Preparation Wizard, Size step

This step is used to specify inclusion probabilities or population sizes for the current stage. Sizes can be fixed or can vary across strata. For the purpose of specifying sizes, clusters specified in previous stages can be used to define strata. Note that this step is necessary only when Equal WOR is chosen as the Estimation Method.

Units. You can specify exact population sizes or the probabilities with which units were sampled.

„Value. A single value is applied to all strata. If you should enter a non-negative integer. If

a value between 0 and 1, inclusive.

Population Sizes is selected as the unit metric, is selected, you should enter

„Unequal values for strata. Allows you to enter size values on a per-stratum basis via the Define Unequal Sizes dialog box.

„Read values from variable. Allows you to select a numeric variable that contains size values for strata.