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PWPLOTI: Stata module to plot power curve for sample size and power calculation

Author

Listed:
  • Zhiqiang Wang

    (Menzies School of Health Research)

Programming Language

Stata

Abstract

pwploti plots statistical power on the Y-axis and the required sample size of on the X-axis. Several lines can be plotted on the power curve, each one corresponding to a value of difference (defined in dlist) between two groups. It is an extension to sampsi. Most sampsi options are accepted. Note: pwploti only specifies the mean or proportion value in group 1, #1. The corresponding values in group 2 are derived from the #1 and differences between two groups, dlist. -keyplot- (q.v.) should be installed when more than four labels are needed.

Suggested Citation

  • Zhiqiang Wang, 1999. "PWPLOTI: Stata module to plot power curve for sample size and power calculation," Statistical Software Components S377701, Boston College Department of Economics, revised 04 Dec 2000.
    • Handle: RePEc:boc:bocode:s377701
    Note: This module may be installed from within Stata by typing "ssc install pwploti". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/p/pwploti.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/pwploti.hlp
    File Function: help file
    Download Restriction: no
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    More about this item

    Keywords

    power curve; sample size; Stata;
    All these keywords.

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