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SAMPSI_RHO: Stata module to compute sample size for a Pearson correlation

Author

Listed:
  • Adrian Mander

Programming Language

Stata

Abstract

sampsi_rho calculates either the sample size or power for a Pearson correlation. The formula for sample size is ((Za+Zb)/(delta))^2 + 3 where delta is the difference between test value and the null value, Za is the signficance Z-value and Zb is the power Z-value. The correlations are transformed using the Fisher z transformation 1/2ln((1+rho)/(1-rho)) this z is normally distributed with a standard deviation of 1/sqrt(N-3).

Suggested Citation

  • Adrian Mander, 2006. "SAMPSI_RHO: Stata module to compute sample size for a Pearson correlation," Statistical Software Components S456774, Boston College Department of Economics, revised 12 Apr 2011.
    • Handle: RePEc:boc:bocode:s456774
    Note: This module should be installed from within Stata by typing "ssc install sampsi_rho". 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

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    File URL: http://fmwww.bc.edu/repec/bocode/s/sampsi_rho.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/s/sampsi_rho.hlp
    File Function: help file
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