Posted by nono on Tuesday, December 11, 2012 at 1:06pm.
is it true that sample size required to detect an effect size of 0.25 is larger than the sample size required to detect an effect size of 0.05 with 80% power ansd a 5% level of signisicance?

biostatistic  MathGuru, Tuesday, December 11, 2012 at 5:34pm
False. For smaller effect sizes a larger sample size would be required.