<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article  PUBLIC '-//OASIS//DTD DocBook XML V4.4//EN'  'http://www.docbook.org/xml/4.4/docbookx.dtd'><article><articleinfo><title>FAQ/powtabs</title><revhistory><revision><revnumber>4</revnumber><date>2013-03-08 10:17:37</date><authorinitials>localhost</authorinitials><revremark>converted to 1.6 markup</revremark></revision><revision><revnumber>3</revnumber><date>2010-07-22 13:53:37</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>2</revnumber><date>2010-07-22 12:47:07</date><authorinitials>PeterWatson</authorinitials></revision><revision><revnumber>1</revnumber><date>2010-07-22 12:45:03</date><authorinitials>PeterWatson</authorinitials></revision></revhistory></articleinfo><section><title>What sample sizes do I need for doing tests with a given power?</title><orderedlist numeration="arabic"><listitem><para><ulink url="https://lsr-wiki-02.mrc-cbu.cam.ac.uk/statswiki/FAQ/powtabs/statswiki/FAQ/dunp#">Sample sizes for a given power for testing unpaired t-tests</ulink> </para></listitem><listitem><para><ulink url="https://lsr-wiki-02.mrc-cbu.cam.ac.uk/statswiki/FAQ/powtabs/statswiki/FAQ/Power#">Sample sizes for a given power for testing if a correlation equals zero</ulink>  </para></listitem><listitem><para><ulink url="https://lsr-wiki-02.mrc-cbu.cam.ac.uk/statswiki/FAQ/powtabs/statswiki/FAQ/PRsq#">Sample sizes for a given power in a one-way anova</ulink>  </para></listitem><listitem><para><ulink url="https://lsr-wiki-02.mrc-cbu.cam.ac.uk/statswiki/FAQ/powtabs/statswiki/FAQ/categ#">Sample sizes for a given power comparing two independent proportions</ulink> </para></listitem></orderedlist></section></article>