送交者: testtest 于 2005-8-21, 15:48:14:
回答: For f-tests(ANOVA design) before an experiment 由 cornbug 于 2005-8-21, 09:17:51:
PASS does most commonly used power analysis. However, if you are doing a complicated analysis, it's better to have someone trained in statistics to help you, especially for a grant application. Do it by hand only for very simple cases, e.g. two-sample comparison.
You'll need some preliminary data, or some basic summary statistics, or at least some rough estimates, in order to perform a power analysis.