st: Samspi non normality?

["Di Stefano, Paola" <paola.di.stefano@medtronic.com>]

Dear all,

I'm trying to estimate a sample size for two-sample comparison of means
using the command sampsi.
The study is to test for a difference in effectiveness of 0.5 between
two groups, assuming a sd(1.4)
Is there any way to change the normality assumption? Is there another
way to estimate sample size?
 
Thanks
Paola






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