( ( If ( ( your measures ) ( have error ) ) ) ( , ( ( ( take ( that fact ) ) ( into account ) ) . ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP$ your) (NNS measures)) (VP (VBP have) (NP (NN error))))) (, ,) (VP (VB take) (NP (DT that) (NN fact)) (PP (IN into) (NP (NN account)))) (. .)))
If your measures have error, take that fact into account.
(ROOT (S (NP (PRP You)) (ADVP (NP (NP (NN decrease) (NNS errors)) (PP (IN in) (NP (DT an) (NN experiment)))) (IN by)) (VP (VBP take) (NP (JJ many) (NNS measurements))) (. .)))