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Were, after gathering 15 or more samples from the BRB, the mean allowable herbaceous cover <br />of the BRB to be greater than the reference area standard, then the hypothesis of reclamation <br />success would be tested using a parametric test of the "reverse null" hypothesis This would be <br />conducted using the following expression (CDMG 2003 proposed rules revisions, 4.15.11 (2)(c)) <br />x <br />t —Q � _ <br />S_ <br />Y <br />Where: <br />Y = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />,S_ = Standard error of mean j s /'In ] <br />S = Sample standard deviation <br />n = Sample size <br />t, = Calculated t value <br />t, = Table t value (alpha = 0.2) <br />The (reverse) null hypothesis being tested would be that the bond release block mean (µ) was <br />less than or equal to 90% of the standard, stated as Ho p s Q. If t, was greater than the 1- tailed t <br />table value for alpha error probability of .20, with (n -1) degrees of freedom then Ho would be <br />rejected, and revegetation would be deemed successful <br />Were the mean allowable herbaceous cover of an adequate sample from the 2009 Phase II BRB <br />was less than 90% of the cover standard (see above), then a one - sample t -test would be made in <br />the following form to test the hypothesis of reclamation success for cover (CDMG 2003 proposed <br />rules revisions, 4 15 11 (2)(b)) <br />t — Q —x <br />S_ <br />Y <br />Where: <br />1 = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S- = Standard error of mean Is / �n ] <br />S = Sample standard deviation <br />n = Sample size <br />t, = Calculated t value <br />t, = Table t value (alpha = 0.1) <br />C: <br />