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calc -Q x <br />s <br />Where: x = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S - = Standard error of mean E s /,r ] <br />S = Sample standard deviation <br />n = Sample size <br />t = Calculated t value <br />t = Tablet 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 H µ >_ Q. If tcaic was less than or equal to the 1- tailed t <br />table value for alpha error probability of 0.10, at (n -1) degrees of freedom, then H 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 />Mandatory Test A): No Overwhelming Dominant <br />No single plant species may exceed 60% relative cover. <br />Alternative Test B): Total Species Density Test <br />In this test, overall reclamation diversity standard is judged based on the species density values observed <br />along with cover sampling in 100 sq.m. sample plots. Species density numbers are subjected to sample <br />adequacy assessment in the usual manner. <br />For purpose of establishing the range of species density within the reference areas, the 75% range of <br />variation is established as: <br />zxs <br />Where: <br />z = number of standard deviations (both ways from the mean) encompassing <br />75% of the normal distribution (= 1.15; see Rohlf and Sokal 1969, Table P) <br />s = standard deviation (n -1) <br />7 <br />