Syntax: POWER Procedure

The following statements are available in PROC POWER:

PROC POWER <options> ;

LOGISTIC <options> ;

MULTREG <options> ;

ONECORR <options> ;

ONESAMPLEFREQ <options> ;

ONESAMPLEMEANS <options> ;

ONEWAYANOVA <options> ;

PAIREDFREQ <options> ;

PAIREDMEANS <options> ;

PLOT <plot-options> </ graph-options> ;

TWOSAMPLEFREQ <options> ;

TWOSAMPLEMEANS <options> ;

TWOSAMPLESURVIVAL <options> ;

TWOSAMPLEWILCOXON <options> ;

The statements in the POWER procedure consist of the PROC POWER statement, a set of analysis statements (for requesting specific power and sample size analyses), and the PLOT statement (for producing graphs). The PROC POWER statement and at least one of the analysis statements are required. The analysis statements are LOGISTIC, MULTREG, ONECORR, ONESAMPLEFREQ, ONESAMPLEMEANS, ONEWAYANOVA, PAIREDFREQ, PAIREDMEANS, TWOSAMPLEFREQ, TWOSAMPLEMEANS, TWOSAMPLESURVIVAL, and TWOSAMPLEWILCOXON.

You can use multiple analysis statements and multiple PLOT statements. Each analysis statement produces a separate sample size analysis. Each PLOT statement refers to the previous analysis statement and generates a separate graph (or set of graphs).

The name of an analysis statement describes the framework of the statistical analysis for which sample size calculations are desired. You use options in the analysis statements to identify the result parameter to compute, to specify the statistical test and computational options, and to provide one or more scenarios for the values of relevant analysis parameters.

Table 70.1 summarizes the basic functions of each statement in PROC POWER. The syntax of each statement in Table 70.1 is described in the following pages.

See the section Summary of Analyses for a summary of the analyses available and the syntax required for them.