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SAMPLE ADEQUACY DETERMINATION <br />After fifteen (15) cover samples in a BRB or reference area, sample adequacy was evaluated <br />based on total live foliar cover by vascular plants using the following expression: <br />_ tZSZ <br />nm ldxl <br />Where: <br />nm =minimum sample size <br />s~ =Sample variance (n-7 degrees of freedom) <br />d =Precision (0.10 for cover and production; 0.15 for <br />woody plant density) <br />x =Sample arithmetic mean <br />t =The (a=.10) table value fora 1 tail test, n-1 degrees of <br />freedom (infinite degrees of freedom may !fe used if <br />n>30) <br />n =Sample size <br />After thirty (30) production samples in a BRB (20 in BRB-1) or reference area, sample adequacy <br />was evaluated initially based on green weight values (and later based on oven-dry weight values) <br />using the above formula. Testing will ultimately be based on oven-dry weight data. <br />HYPOTHESIS TESTING APPROACHES <br />For BRB-3, in which formal hypothesis testing was pursued, the following procedures were <br />followed: <br />Cover and Production <br />Percent absolute (foliar) first hit herbaceous vegetation cover of BRB-3 2 90% of TWICE the <br />weighted absolute (foliar) first hit herbaceous vegetation cover from the reference areas <br />(weighted based on tJ3% original extent of Mountain Brush /Aspen and 1795 original extant of <br />Sagebrush). The factor of 2x the reference area first hit herbaceous cover of the reference areas <br />is contained in the Seneca ll permit document. <br />a <br />