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Table 4.4-21. Statistical Comparison of Pe~hnt Reference Sites and • <br /> Pre Mine Range Sites for Similarity ae to Production 1/ <br />Permanent Reference SSA X, N, Pre Mine SS= Xz N2 S= tcal 12.05,8 Rej,accept <br />Site (pooled) 2/ Range Site Ho 3/ <br />Mtn shrub 181,104.43 57.7 120 A/B 69,255.5 57.6 57 1430.63 0.12 +1.960 accept <br />Big Sagebrush- 404,624,049 65.5 '141 C 98,810.0 69.8 47 2677.841 .0803 +1.960 accept <br />• a R X where: R1 and X 2 s The arithmetic means for groups (1) and (2). <br />t ~ SZ(N1+Ny) N1 and NZ ~ The number of observations in groups (1) and (2), <br />(N~(NZ) Sz ~ The pooled within-group variance. <br />S . <br />1/ <br />21 <br />n <br />n <br />7 <br />3/ <br />...~ <br />5 <br />J <br />SS1 + SSA <br />(NY-1)+(NZ 1) <br />Freese, 1967 <br />where: SSi ~~Xi- (FXl)2 <br />N <br />SSZ -FX2 - (IX 2)2 <br />N2 <br />All data from the three permanent reference sites for a range site were combined. <br />Ex. Mtn. Shrub permanent reference sites 1, 2, and 3 were combined, see Table 2 <br />Ho: ~a~..uZ <br />H~:..ul+,µ2 <br /> <br />