random-python
diff --git a/‎scipy/odr/_odrpack.py
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+4Lines changed: 4 additions & 0 deletions b/‎scipy/odr/_odrpack.py
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@@ -553,6 +553,10 @@ class Output:
         Standard deviations of the estimated parameters, of shape (p,).
     cov_beta : ndarray
         Covariance matrix of the estimated parameters, of shape (p,p).
+        Note that this `cov_beta` is not scaled by the residual variance 
+        `res_var`, whereas `sd_beta` is. This means 
+        ``np.sqrt(np.diag(output.cov_beta * output.res_var))`` is the same 
+        result as `output.sd_beta`.
     delta : ndarray, optional
         Array of estimated errors in input variables, of same shape as `x`.
     eps : ndarray, optional