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s3 (0.9 s s,.: )� <br />,, br: rgf <br />2195.0 - (0.9 • 10 ,96.5) <br />11119654.E (0,Si • 16. 50.9) <br />Ni 30 + �0 <br />1111y65 •.6 (0.81 - 162650.9i <br />30 + 0 <br />( 193.' 4 (0� * 76.2) <br />30 1 30 - 1 <br />= 16. -11 <br />= 35.7 o- 36 <br />Since critical t = 0.852 (one - tailed, alpha = 0.2, 36 dfsat) and t (16.41) is greater than this critical value, <br />the hypothesis of no difference is rejected. Consequently revegetation success for Phase III in BRB -5 <br />relative to the Sagebrush Reference Area is demonstrated. <br />Since the herbaceous production of BRB -5 has been shown to exceed both reference areas via the <br />above hypothesis tests, revegetation success is indicated for herbaceous production in 2011. <br />WOODY PLANT DENSITY <br />Figure C -3 and C -4 graphically presents the "Background" and "Concentration Area" woody plant density <br />averages for the 2011 BRB -5, respectively. As can be seen, the 554.4 stems per acre observed in the <br />Background area far exceed the 90 stems per acre (90 percent of the 100 stems per acre background <br />standard) performance standard. The mean of 2,035.6 stems per acre observed in the Concentration <br />areas also well exceeds the 900 stems per acre (90 percent of the 1,000 stems per acre background <br />standard) performance standard. The total Concentration Area identified was 19.0 acres, or 7.1% of the <br />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 2011. <br />A reverse t -test of the assertion that the 2011 BRB -5 Background woody plant density is indistinguishable <br />from 90% of the standard is as follows: <br />22 <br />