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<br /> <br />Table 7. Sample Adequacy -Cover, Production, and Shrub Density, Seneca II-W Mine, SCC, poutt Co., CO - 1997 <br />---------COVER--------- ----------PRODUCTION-------- -------SHRUB DENSIN------- <br />N-min•• N-min•• N-min•• <br />ARFA (Percenq st. dev. N• n-1 (Q/0.5 sq. m.) st. dev. N• n-1 (#/100 sq.m.l st. dev. N` n-1 <br />1991/1993 Reclaimed ~ 45.9 ~ 9.8 ~ 15 15 70.7 58.2 15 217 ~ ~ 38.9 87.1 75 1,555 <br />•N =Semple Size <br />••N-min = Minimum sample size necessary to detect a 10% reduction in the mean with 90% confidence using n-1 degrees of freedom, end etwo-tailed test. <br />