BUG: change to _trans to fix unit test

Author: wesm

pandas/stats/ols.py

@@ -876,8 +876,8 @@ def _resid_stats(self):
         sst = []
         sse = []
 
-        Y = self._y
-        X = self._x
+        Y = self._y_trans
+        X = self._x_trans
 
         dates = self._index
         window = self._window

pandas/stats/plm.py

@@ -396,8 +396,8 @@ def resid(self):
     @cache_readonly
     def _rmse_raw(self):
         """Returns the raw rmse values."""
-        X = self._x.values
-        Y = self._y.values.squeeze()
+        X = self._x_trans.values
+        Y = self._y_trans.values.squeeze()
 
         resid = Y - np.dot(X, self._beta_raw)
         ss = (resid ** 2).sum()