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Noxious Weed Cover <br />• Total Minus Noxious <br />Allowable Annual Cover Limit <br />Allowable Annual Cover <br />Actual Annual Cover (w/o noxious Annuals) <br />Non-allowable Annual Cover ((zero in calculations <br />below if positive) <br />ALLOWABLE COVER CALCULATION <br />Total All Hit Vegetation Cover <br />Noxious Weed Cover <br />Total Minus Noxious <br />N/A Annual Cover Deduction <br />Woody Plants - Not Allowed <br />Mean Allowable Cover <br />Standard Deviation of Mean Allowable Cover <br />Sample Size <br />Minimum Adequate Sample Size <br />1.03 <br />56.67 <br />X 0.1 <br />5.67 <br />18.47 <br />-12.8 <br />57.70 <br />1.03 <br />56.67 <br />12.8 <br />0.90 <br />42.97 <br />15.87 <br />35 <br />24 <br />• Assessment of BRB for Compliance with Phase 11 Performance Standards <br />COVER <br />The area-weighted average of reference area values was calculated based on the following <br />information: <br />Vegetation Type Percent All-Hit Allowable <br />Herbaceous Cover % of Pre-mining Area <br />Aspen 87.30 24.4 <br />Mountain Brush 40.55 48.9 <br />Sagebrush 35.80 24.0 <br />Steep Mountain Brush 17.30 2.7 <br />The weighted average is calculated as 87.30 X 0.244 + 40.55 X 0.489 + 35.80 X 0.240 +17.30 X <br />0.027 = 50.19 . The cover performance standard is thus 50.19 x 0.9 = 45.17 <br />Application of a one-sample t-test (using the traditional null hypothesis) that tests the assertion <br />. that the 2010 Phase II BRB mean allowable cover is indistinguishable from 90% of the standard <br />is contained in the following calculation: <br />ESCO Assoc. E-14