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Table RS-2 Blue Ribbon - 2004 <br />Phase lIIRevegetatlon Success~Comparisons* <br /> Grassland Riparian <br />2004 Reference Area <br />/ Standard a~uaa~oa a~ Reference Area <br />/Standard G3o~ll0l~~ QGC~ <br /> <br /> Value Value P~ ~ Value Value P~ / <br /> <br />Total Herbaceous Cover (excluding noxious weeds) <br />Estimated Mean (%) 28.40 45.44 36.47 47.25 <br />90% of Reference Area Mean 25.56 25.56 32.82 32.82 <br />Standard Deviation 6.05 11.02 9.02 10.19 <br />Sample Size Collected 15 18 15 16 <br /> p~ p~ <br />Minimum Sample Necessary (10/90) 13.58 12.95 11.89 9.58 <br />90% Conf. Int. for Mean (t) 2.57 4.27 3.83 4.19 <br />Calculated t-statistic (t*) <br />Tabular talue for t <br />Total Herbaceous Production (excluding noxious weeds) <br />Estimates Mean (Ibs./acre) 231.79 432.31 331.18 555.83 <br />90% of Reference Area Mean 208.61 208.61 298.06 298.06 <br />Standard Deviation 90.16 94.09 182.55 255.65 <br />Sample Size Collected 20 25 20 24 <br /> PAS$ PA$$ <br />Minimum Sample Necessary (10/90) 45.24 13.87 90.84 63.30 <br />90% Conf. Int. for Mean (t) 33.16 30.95 67.14 85.84 <br />CalcvlaGed t-statistic (t*) <br />Tabular !aloe for t <br />Diversity <br /># of Cool-Season Perennial Grasses <br />Perennial Forbs Relative Cover p/t$$ pp$$ <br /># of Shrub Speaes Observed <br />Woody Plant Density <br />Estimated Mean (stems/acre) 100 104 1000 5807 <br />90% of Reference Area Mean 90 90 900 900 <br />Standard DevWtlon 103.23 3446.55 <br />Sample Size Collected 25 24 <br /> FAIL. pA$$ <br />Minimum Sample Necessary (10/90) 290.26 103.47 <br />90% Conf. Int for Mean (f) 33.96 1157.19 <br />Calculated t-statistic (t*) 6° 8• <br />Tabular talus for t <br />* Note: These comparisons are made using the proposed changes to the Suucess Criterion (see Table XX) <br />~CIIruAiP C~~ AffiffidD~IIA7f~Sl INC. Page 18 Blue Ribbon Mine - Revegetatlon Evaluation <br />