I downloaded the StatsModels source from this location. Then untarred to /usr/local/lib/python2.7/dist-packages and per this documentation, did this sudo python setup.py install It installed but when I try to import import statsmodels.api as sm I get the following error Traceback (most recent call last): File "/home/Astrophysics/Histogram_Fast.py", line 6, in <module> import statsmodels.api as sm ImportError: No module named statsmodels.api I read a few post with a similar problem and checked that setuptools was installed and it was also in /usr/local/lib/python2.7/dist-packages I'm kinda of lost on this and would appreciate any help... I am also running numpy 1.6 so thats not the problem. Continue reading...