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<br />SEsat = Satterthwaite-approximated Standard Error <br />sbr = 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 />Equation 4 (SE_)4 df. (n? -1) n f-1 1 <br />Where: <br />dfsat = Satterthwaite-approximated degrees of freedom <br />www.bio-geoxom <br />Lastly, a one-sided reverse-null t-test with alpha = 0.20 is used as follows: <br />X? <br />Equation 5 r -((0 9)X, f) <br />= 1W. <br />Where: <br />t = calculated t-value <br />Xbr = bond release site (reclaimed site) sample mean <br />Xref = reference area sample mean <br />The null hypothesis being tested is that the mean value for the reclaimed site is less than or <br />equal to Q. If the null hypothesis is rejected vegetation is successful. <br />7