statsmodels/statsmodels — pull request #1273 by dfrusdn (2013-12-27 12:00:11+00:00)
Title: Adding Cronbach Alpha

Added Cronbach Alpha function with improve code from

https://github.com/statsmodels/statsmodels/issues/1272

Still may need a function to omit arrays with NaN.

Someone might want to adjust the return values since R yields

Cronbach's Alpha = Calpha
Sample size = nitems
Number of items = len(tscores)