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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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366 CSPLAN<br />

EQUAL_WOR<br />

Equal selection probabilities without replacement. POPSIZE or INCLPROB<br />

must be specified.<br />

UNEQUAL_WOR<br />

Unequal selection probabilities without replacement. If POPSIZE or IN-<br />

CLPROB is specified it is ignored and a warning is issued.<br />

WR Selection with replacement. If POPSIZE or INCLPROB is specified it is ignored<br />

and a warning is issued.<br />

POPSIZE Subcommand<br />

The POPSIZE subcommand specifies the population size for each sample element. Specify<br />

a single value, a variable name, or a matrix of counts for design strata.<br />

• The POPSIZE and INCLPROB subcommands are mutually exclusive. An error occurs if<br />

both are specified for a particular stage.<br />

• Population size values must be positive integers.<br />

VALUE Apply a single value to all strata. For example, VALUE=1000 indicates that<br />

each stratum has a population size of 1000.<br />

MATRIX Specify disproportionate population sizes for different strata. Specify one or<br />

more variables after the MATRIX keyword. Then provide one size specification<br />

per stratum. A size specification includes a set of category values and a<br />

population size value. Category values should be listed in the same order as<br />

variables to which they apply. Semicolons are used to separate the size specifications.<br />

For example, the following syntax specifies that units in the North stratum<br />

were sampled from a population of 1000. The population size for the South<br />

stratum is specified as 2000:<br />

/SIZE MATRIX=region; ‘North’ 1000; ‘South’ 2000<br />

If there is more than one variable, specify one size per combination of strata.<br />

For example, the following syntax specifies rate values for combinations of<br />

Region and Sex strata:<br />

/SIZE MATRIX=region sex; ‘North’ ‘Male’ 1000; ‘North’ ‘Female’1500; ‘South’<br />

‘Male’ 2400; ‘South’ ‘Female’ 3000<br />

The variable list must contain all or a subset of stratification variables from<br />

the same and previous stages and cluster variables from the previous stages.<br />

An error occurs if the list contains variables that are not defined as strata or<br />

cluster variables.<br />

Each size specification must contain one category value per variable. If multiple<br />

size specifications are provided for the same strata or combination of

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