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Ai RA 2016 74.6 20.1 20 13 1.328 <br /> MB1 RA 2016 44.9 11.5 16 12 1.341 <br /> SB1 RA 2016 36.4 9.6 17 13 1.337 <br /> SMB1 RA 2016 28.2 5.6 17 7 1.337 <br /> 1 Reference Area Types (RA): A = aspen, MB = mountain brush, SB = sagebrush, SMB = steep <br /> mountain brush, WW/AS =western wheatgrass/alkali sagebrush <br /> 2 See text below for statistical measure to address sample adequacy and use of adjusted Steep <br /> Mountain Brush data for 2015success evaluations. Value in parenthesis represents the upper 90% <br /> probability value of the mean used in success evaluations. <br /> In 2015, sample adequacy based on all-hit allowable herbaceous cover was not achieved for the <br /> Steep Mountain Brush type in the Extended Reference Area. Note however that sample adequacy <br /> based on all hit total foliar cover was met in 2015 (Table C-4 in Attachment D). An alternative <br /> that used the upper 90%probability value of the mean was exercised. In other words, after having <br /> established a reliable estimate of population variance having taken 17 samples in 2015, the <br /> maximum possible values of the mean(with 90%confidence)was taken to represent the allowable <br /> herbaceous cover of the Steep Mountain Brush type within the reference area. This was calculated <br /> in either of two ways below. <br /> 2015 data <br /> 1) Confidence Intervals <br /> C.I. = (sNn)*t = (9.04N17)*1.337 =2.93 <br /> 22.7+2.93 = 25.63 <br /> 2) Sample Adequacy Expression <br /> S 2 t 2 <br /> N = <br /> d2_y2 <br /> d = �((s2t2)/(x2N)) = �((9.042*1.3372)/(22.72*17))= 0.129 <br /> X+d= 22.7 + (22.7 *0.129) = 25.63 <br /> SL-7 - 10 <br />