This workshop will first review and discuss core principles and issues involved in power analysis. But most of the day will be spent studying realistic examples of statistical planning, demonstrating how UnifyPow and, at times, the other products can be used to handle a wide variety of designs and methods. Mathematical theory and details about computing algorithms will not be stressed. While primary focus will be on choosing sample sizes in order to assure adequate power for typical hypothesis testing, analogous considerations will also be given to assuring sufficiently tight confidence intervals and strong tests of equivalence. Most of the day will focus on common data analysis methods. The software will be demonstrated live and will be available for at least limited hands-on use. For more information, visit the following web sites:
|Power and Precision||www.PowerAndPrecision.com|
He is now at the Cleveland Clinic Foundation, where he directs a large group of biostatisticians and programmers who support Foundation projects that altogether lead to almost 2000 publications per year. In addition to his work in power analysis, Ralph is also the creator of O'Brien's test for equality of variances, a method now available in the regular SAS System (via PROC GLM), as well as in JMP for Windows and Macs. For more, visit Ralph's home page.