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N= <br />s't` <br />d "• <br />d— <br />sZt <br />= 0.1644 <br />2) Sample Adequacy Expression <br />9.19 =1.725" <br />20.95" * 21 <br />+ d= 20.95 + (20.95 * 0.1644) = 24.39 <br />24.39 percent allowable herbaceous cover represents the highest possible value of the true mean for the <br />Mountain Brush Reference Area. <br />[Note in the above two- tailed t values with n -1 degrees of freedom are used. We are concerning <br />ourselves with the full range of possible values for mean, thus bi- directional concerns are evident. From <br />the CDRMS point of view this pushes the limits out further and produces the highest maximum value for <br />the mean (at 90% confidence).] <br />Calculation of 90 percent of the cover performance standard appropriate for 2011 sampling using the <br />highest possible value for the Mountain Brush Reference Area component is demonstrated below. <br />Mountain Brush Reference Area Allowable First -Hit Herbaceous Cover*(24.4 %) X 2 = 48.4% <br />Sagebrush Reference Area Allowable First -Hit Herbaceous Cover" (44.4 %) X 2 = 88.8% <br />90 percent of the Cover Standard = 0.90 [0.83(48.4 %) + 0.17(88.8 %)] = 49.7% <br />* Herbaceous cover adjusted by subtracting noxious weeds and annual/biennial plant cover in excess of 10% of the remainder. <br />The mean allowable first -hit herbaceous vegetation cover sampled in 2011 BRB PSCM -1 was 55.8 <br />percent, exceeding 49.7 percent, which is 90 percent of the upwardly adjusted cover performance <br />standard (see also Figure C -1, Table C -1). Thus for 2011, successful revegetation with respect to <br />allowable first -hit herbaceous cover is indicated. <br />