Hello everyone. I have a quick question about the p-values calculated by the 
dtt function in geiger ($MDIpVal in the function output): Does the p-value 
correspond to p[MDI>=0] (ie. one-tailed) or p[abs(MDI)>=0] (two-tailed)? 
Looking at the code for getMDIp() it seems like the p-value is one-tailed, but 
I wanted to confirm.

Thanks!

Roberto

Roberto M�rquez
Postdoctoral Scholar
Department of Ecology and Evolution
University of Chicago

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