Russ lenth’s power and sample size calculation1 can calculate the power for Chi-square test and poisson test. PS3 can calculate the power for Mantel-Haenszel test, also independent or matched chi-squared test and fisher’ exact test in case-control studies. 6. Inference related to survival studies PS3 provides the calculation based on the log-rank test, the alternative hypotheses are specified in terms of the hazard ratio for control subjects relative to experimental subjects or the median survival times for control and experimental subjects. Another free one called QUANTO6, which is also the power/sample size calculator but different with all above, is specifically applied in the field of association studies of genes, gene-environment interaction, or gene-gene interaction. And some paid software, NCSS, PASS, GESS7 and Studysize 2.08 are also included in the GCRC website. I can’t access these software to see how they works. Just from the online manuals, they all very powerful and not only do the power/sample size calculation also almost all kinds of common statistical analysis. Software link list 1. Russ lenth’s power and sample size calculation (use true different, no effect size) 2. Wessa.net Lots of statistics software offered, all based on R modules, but with very little note to explain what it is and how it works 3. PS 4. SOCR Jave based software with lots of other functions. But it is not stable, the program get no response quit often. 5. MACORR 6. QUANTO 7. NCSS, PASS, GESS
Russ lenth’s power and sample size calculation1 can calculate the power for Chi-square test and poisson test. PS3 can calculate the power for Mantel-Haenszel test, also independent or matched chi-squared test and fisher’ exact test in case-control studies. 6. Inference related to survival studies PS3 provides the calculation based on the log-rank test, the alternative hypotheses are specified in terms of the hazard ratio for control subjects relative to experimental subjects or the median survival times for control and experimental subjects. Another free one called QUANTO6, which is also the power/sample size calculator but different with all above, is specifically applied in the field of association studies of genes, gene-environment interaction, or gene-gene interaction. And some paid software, NCSS, PASS, GESS7 and Studysize 2.08 are also included in the GCRC website. I can’t access these software to see how they works. Just from the online manuals, they all very powerful and not only do the power/sample size calculation also almost all kinds of common statistical analysis. Software link list 1. Russ lenth’s power and sample size calculation (use true different, no effect size) 2. Wessa.net Lots of statistics software offered, all based on R modules, but with very little note to explain what it is and how it works 3. PS 4. SOCR Jave based software with lots of other functions. But it is not stable, the program get no response quit often. 5. MACORR 6. QUANTO 7. NCSS, PASS, GESS
powerweb.docx