POWER PROPORTIONS INDEPENDENT

POWER PROPORTIONS INDEPENDENT is available in IBM® SPSS® Statistics Base Edition. The command invokes the power analysis for the independent-sample binomial test to compare two independent proportion parameters.

POWER PROPORTIONS INDEPENDENT
    /PARAMETERS
        [ TEST = {NONDIRECTIONAL**} {DIRECTIONAL} ]
        [ SIGNIFICANCE = {0.05**} {value} ]
        { N = {integer1 integer2} }
        { POWER=[value] | [value1 TO value2 BY value3] }
        [ NRATIO = {1**} {value} ]
        PROPORTIONS = {value1 value2}
        [ METHOD = {CHISQ**} {T} {LRT} {FISHER} ]
        [ ESTIMATE = {NORMAL**} {BINOMIAL} ]
        [ TIMER = {value} ]
        [ CONTINUITY = {FALSE**} {TRUE} ]
        [ POOLED = {TRUE**} {FALSE} ]
    [ /PLOT
        [ N1_XAXIS([integer1 integer2]) N2_YAXIS([integer1 integer2]) ]
        [ N1_YAXIS([integer1 integer2]) N2_XAXIS([integer1 integer2]) ]
        [ P1_XAXIS P2_YAXIS ]
        [ P1_YAXIS P2_XAXIS ]
        [ NRATIO([value1 value2]) ]
        [ RISK_DIFF ]
        [ RISK_RATIO([value1 value2]) ]
        [ ODDS_RATIO([value1 value2]) ]
        [ TOTAL_N ]
        [ VROTATE({10**} {integer}) ]
        [ HROTATE({325**} {integer}) ] ]
    [ /PRECISION
        [ HALFWIDTH={values} ]
        [ CITYPES = [WALD] [WALDCC] [AGRESTI_CAFFO] [CARLIN_LOUIS] [BROWN_LI_JEFFREYS]
                    [HAUCK_ANDERSON] [NEWCOMBE] [NEWCOMBECC] ]

** Default if the subcommand or keyword is omitted.

This command reads the active dataset and causes execution of any pending commands. See the topic Command Order for more information.

Syntax for the POWER PROPORTIONS INDEPENDENT command can be generated from the Power Analysis of Independent-Sample Binomial Test dialog.

Release History

Release 28.0.1

• Added support for the PRECISION subcommand.

Release 28.0

• PARAMETERS subcommand's POWER keyword supports [value1 TO value2 BY value3].
• PLOT subcommand supports TOTAL_N keyword.