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Where: <br />SEwt = Satterthwaite- approximated Standard Error <br />sbI = bond release site (reclaimed site) sample standard deviation <br />sref = reference area sample standard deviation <br />nbr = bond release site (reclaimed site) sample size <br />nref = reference area sample size <br />Next, the Satterthwaite degrees of freedom are calculated as <br />t� <br />(SE,r) + <br />�n —1) <br />( br <br />Where: <br />SM)4 <br />4 <br />�) <br />n,,,f -1 <br />df ,,t = Satterthwaite- approximated degrees of freedom <br />Lastly, a one -sided reverse -null t-test with alpha = 0.20 is used as follows: <br />August 2013 PR -08 2.05.4(2)(e) - 35 <br />