Fixing a few broken/non doctests in the stats module.
Fixing a few broken/non doctests in the stats module.

joergdietrich/astropy,AustereCuriosity/astropy,StuartLittlefair/astropy,DougBurke/astropy,larrybradley/astropy,AustereCuriosity/astropy,saimn/astropy,larrybradley/astropy,astropy/astropy,AustereCuriosity/astropy,pllim/astropy,stargaser/astropy,lpsinger/astropy,StuartLittlefair/astropy,pllim/astropy,astropy/astropy,kelle/astropy,bsipocz/astropy,tbabej/astropy,mhvk/astropy,stargaser/astropy,joergdietrich/astropy,funbaker/astropy,MSeifert04/astropy,dhomeier/astropy,kelle/astropy,mhvk/astropy,DougBurke/astropy,larrybradley/astropy,dhomeier/astropy,lpsinger/astropy,lpsinger/astropy,MSeifert04/astropy,kelle/astropy,MSeifert04/astropy,stargaser/astropy,saimn/astropy,funbaker/astropy,pllim/astropy,joergdietrich/astropy,joergdietrich/astropy,tbabej/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,astropy/astropy,DougBurke/astropy,tbabej/astropy,AustereCuriosity/astropy,dhomeier/astropy,mhvk/astropy,kelle/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,funbaker/astropy,DougBurke/astropy,tbabej/astropy,dhomeier/astropy,saimn/astropy,mhvk/astropy,stargaser/astropy,bsipocz/astropy,kelle/astropy,dhomeier/astropy,lpsinger/astropy,bsipocz/astropy,funbaker/astropy,pllim/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,joergdietrich/astropy,saimn/astropy,StuartLittlefair/astropy,bsipocz/astropy,StuartLittlefair/astropy,astropy/astropy,larrybradley/astropy,saimn/astropy,astropy/astropy,MSeifert04/astropy,lpsinger/astropy,mhvk/astropy,tbabej/astropy,pllim/astropy