POWERCAL: Stata module to perform general power and sample size calculations

Statistical Software Components from Boston College Department of Economics

Abstract: powercal performs general power and sample size calculations, storing the result in a new variable. powercal can calculate any one of the number of sampling units, power, alpha (significance level), delta (difference in parameter value to be detected), or the standard deviation (SD) of the influence function. (The SD of the influence function is defined as the expected standard error of the sample difference multiplied by the number of sampling units.) Any of these 5 quantities can be calculated from the other 4. -powercal takes, as input, expressions delivering variables containing the 4 input quantities, and creates, as output, a variable containing the output quantity. These variables can then be plotted against each other, giving colleagues a view, at a glance, of the trade-offs involved.

Language: Stata
Requires: Stata version 7.0
Keywords: power; sample size (search for similar items in EconPapers)
Date: Written 2001-08-20
Note: This module may be installed from within Stata by typing "ssc install powercal". Windows users should not attempt to download these files with a web browser.

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/p/powercal.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/p/powercal.hlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/p/powercal.pdf manual (application/pdf)

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