POPSIZE Subcommand (CSPLAN command)
The POPSIZE
subcommand specifies the population size for each sample element.
Specify a single value, a variable name, or a matrix of counts for
design strata.
- The
POPSIZE
andINCLPROB
subcommands are mutually exclusive. An error occurs if both are specified for a particular stage. - Population size values must be positive integers.
VALUE. Apply a single value to all strata. For
example, VALUE=1000
indicates
that each stratum has a population size of 1,000.
MATRIX. Specify disproportionate population sizes for different
strata. Specify one or more variables after the MATRIX
keyword. Then provide one size specification
per stratum. A size specification includes a set of category values
and a population size value. Category values should be listed in the
same order as variables to which they apply. Semicolons are used to
separate the size specifications.
For example, the following syntax specifies that units in the North stratum were sampled from a population of 1,000. The population size for the South stratum is specified as 2,000:
/SIZE MATRIX=region; 'North' 1000; 'South' 2000
If there is more than one variable, specify one size per combination of strata. For example, the following syntax specifies rate values for combinations of Region and Sex strata:
/SIZE MATRIX=region sex; 'North' 'Male' 1000; 'North' 'Female' 1500;
'South' 'Male' 2400; 'South' 'Female' 3000
- The variable list must contain all or a subset of stratification variables from the same and previous stages and cluster variables from the previous stages. An error occurs if the list contains variables that are not defined as strata or cluster variables.
- Each size specification must contain one category value per variable. If multiple size specifications are provided for the same strata or combination of strata, only the last one is honored.
- String and date category values must be quoted.
- A semicolon must appear after the variable list and after each size specification. The semicolon is not allowed after the last size specification.
VARIABLE. Specify the name of a single variable that contains the population sizes.