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The (reverse) null hypothesis being tested would be that the bond release block mean (µ) was less than <br />or equal to 90% of the standard, stated as Ho: g <_ Q. If tr was greater than the 1- tailed t-table value for <br />alpha error probability of 0.20, with (n -1) degrees of freedom then Ho would be rejected, and revegetation <br />would be deemed successful. <br />Were the mean allowable herbaceous cover of an adequate sample from the BRB less than 90% of the <br />cover standard (see above), then a one - sample t -test would be made in the following form to test the <br />hypothesis of reclamation success for cover (CDMG 2005 revised rule, 4.15.11 (2)(b)): <br />S- <br />x <br />Where: <br />x = Bond Release Block Sample Mean <br />0 = 90% of Standard <br />S- =Standard error of mean IS i,rl <br />x <br />s = Sample standard deviation <br />n = Sample size <br />t, = Calculated t value <br />tl = Table t value (alpha = 0.1) <br />The (traditional) null hypothesis being tested would be that the bond release block mean (g) was greater <br />than or equal to 90% of the standard, stated as Ho: µ >_ Q. If tc 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 (SPECIES COMPOSITION) <br />For purposes of assessment of progress toward Phase II bond release standards, species diversity <br />(species composition) is judged using the following four tests present in the provisions of the permit; <br />success is demonstrated by passing the first (A) and at least two of the remaining three (B, C, and D). <br />7 <br />