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SE,.ef = the reference area standard error of the mean, <br />SEsat = the denominator of the t- statistic, <br />nb,= the revegetation area sample size, and <br />nref= the reference area sample size. <br />Revegetation is successful when the one -sided null hypothesis is rejected: the test statistic is greater than <br />t,_a df, . The conclusion is that the revegetation mean is greater than 90% of the reference mean. <br />Were the mean allowable herbaceous cover or production of an adequate sample from the BRB less than <br />90% of the cover standard (see above), then a one - sample Nest would be made in the following form to <br />test the hypothesis of reclamation success for cover (CDMG 2010 proposed rules revisions, 4.15.11 <br />(2)(b)): <br />t = Q —x <br />S- <br />x <br />Where: x = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />Sx =Standard error of mean [s/�n <br />S = Sample standard deviation <br />n = Sample size <br />tc = Calculated t value <br />tt = Table t value (alpha = 0.1) <br />The (traditional) null hypothesis being tested would be that the bond release block mean (µ) was greater <br />than or equal to 90% of the standard, stated as Ho: g >_ Q. If t, was less than or equal to the 1- tailed t table <br />value for alpha error probability of 0.10, at (n -1) degrees of freedom, then Ho was not rejected, and <br />revegetation was deemed successful. <br />Species Diversity <br />For purposes of assessment of progress toward bond release standards, species diversity is judged using <br />the following four tests present in the provisions of the permit; success is demonstrated by passing the <br />first (A) and at least two of the remaining three (B, C, and D). <br />0 <br />