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BRB -5 (269.3 acres). Hence the standard that there would be at least 5% of the Phase III BRB block with <br />at least 1,000 stems per acre has been met for 2012. <br />A reverse t-test of the assertion that the 2012 BRB -5 Background woody plant density is indistinguishable <br />from 90% of the standard is as follows: <br />x — (0.9 = tech -Wcal standard) <br />tcaic = <br />r1�) <br />t,t, alc — _210.4 -90 =2.23 <br />392.5 <br />Since critical t = 0.850 (one - tailed, alpha = 0.2, 53 -1 df) and ta,, is greater than this critical value, the <br />hypothesis of no difference is rejected and reclamation success for 2012 BRB -5 background woody plant <br />density under Phase III is demonstrated. <br />A reverse t-test of the assertion that the 2011 BRB -5 Concentration Area woody plant density is <br />indistinguishable from 90% of the standard is as follows: <br />z — (0.9 = technical standard) <br />tGQtG _ — <br />(;�n) <br />t = 4 <br />1614.7 - 900 =.07 <br />cQ is 1278.8 <br />k 53 ) <br />Since critical t = 0.850 (one - tailed, alpha = 0.2, 53 -1 df) and Ui, is greater than this critical value, the <br />hypothesis of no difference is rejected and reclamation success for BRB -5 2012 woody plant <br />concentrations areas under Phase III is demonstrated. <br />29 <br />