Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.
|
|
|
|
Re: post hoc power analysis of t-test
Posted:
Jan 17, 2013 6:32 PM
|
|
On Thursday, January 17, 2013 11:42:07 PM UTC+13, Keren wrote:
> I have to groups that differ in their mean values. Using the ttest2 function I performed the t test but now I am having trouble calculating the power of my analysis
Keren,
These articles may help you:
Froman, T., & Shneyderman, A. (2004). Replicability reconsidered: An excessive
range of possibilities. Understanding Statistics, 3, 365-373.
Yuan, K.-H., & Maxwell, S. (2005). On the post hoc power in testing mean
differences. Journal of Educational and Behavioral Statistics, 30 (2), 141-167.
I'm pretty sure that one will tell you how to compute post-hoc power for your situation, but also that both will tell you it's a useless and misleading thing to compute. (sorry)
|
|
|
|
