IBM SPSS COMPLEX SAMPLES 19 manual Sampling Wizard Draw Sample Selection Options

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Chapter 2

Sampling Wizard: Draw Sample Selection Options

Figure 2-8

Sampling Wizard, Draw Sample Selection Options step

This step allows you to choose whether to draw a sample. You can also control other sampling options, such as the random seed and missing-value handling.

Draw sample. In addition to choosing whether to draw a sample, you can also choose to execute part of the sampling design. Stages must be drawn in order—that is, stage 2 cannot be drawn unless stage 1 is also drawn. When editing or executing a plan, you cannot resample locked stages.

Seed. This allows you to choose a seed value for random number generation.

Include user-missing values. This determines whether user-missing values are valid. If so, user-missing values are treated as a separate category.

Data already sorted. If your sample frame is presorted by the values of the stratification variables, this option allows you to speed the selection process.