IBM Water System SPSS COMPLEX SAMPLES 19 Manual do Utilizador descarregar pdf (Página 26)

Chapter 2

Sampling Wizard: Output Variables

Figure 2-6

Sampling Wizard, O utput Variables step

This step allows you to choose variables to save when the sample is drawn.

Population size. The estimated number of units in the population for a given stage. The rootname

for the saved variable is PopulationSize_.

Sample proportion. The sampling rate at a given stage. The rootname for the saved variable is

SamplingRate_.

Sample size. The number of units drawn at a given stage. The rootname for the saved variable

is SampleSize_.

Sample weight. The inverse of the inclusion probabilities. The rootname for the saved variable is

SampleWeight_.

Some stagewise variables are generated automatically. These include:

Inclusion p robabilities. The proportion of units drawn at a given stage. The rootname for the saved

variable is InclusionProbability_.

Cumulative weight. The cumulative sample weight over stages previous to and including the

current one. The rootname for the saved variable is SampleWeightCumulative_.

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IBM Water System SPSS COMPLEX SAMPLES 19 Manual do Utilizador Página 26