142013-03-08 10:17:12localhostconverted to 1.6 markup132007-07-13 11:11:11PeterWatson122007-07-13 11:11:03PeterWatson112007-07-13 11:09:54PeterWatson102007-01-15 09:52:51PeterWatson92007-01-15 09:52:26PeterWatson82007-01-09 16:07:25PeterWatson72007-01-09 16:07:06PeterWatson62007-01-09 16:03:05PeterWatson52006-10-23 11:24:37PeterWatson42006-10-23 11:15:30PeterWatson32006-10-23 11:10:32PeterWatson22006-10-18 14:02:33PeterWatson12006-10-18 13:59:38PeterWatsonAn on-line power calculator is available. Computes total sample size needed for testing prop=const where prop and const are observed and expected (constant) proportions respectively and alpha is the (two-tailed) type I error for a given power. A calculator is available in a spreadsheet. [COPY AND PASTE THE SYNTAX BELOW INTO A SPSS SYNTAX WINDOW AND RUN; SET DATA AS DESIRED]