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cover/woody plant density sampling location, the slope, expressed as a percent, and aspect of <br />• the site, in degrees not corrected for magnetic declination, were determined and recorded, as <br />was the orientation of the transect. <br />Assessment of Reclamation Adequacy <br />GENERAL <br />Formal (statistical) hypothesis testing (see below) was undertaken for the Phase II Bond Release <br />Block (post-law, Permanent program lands). <br />SAMPLE ADEQUACY DETERMINATION <br />Sample adequacy calculations for parameter estimation were carried out using the formula as <br />prescribed by the Colorado Mined Land Reclamation Board for parameter estimation without <br />hypothesis testing (DMG 1995): <br />t 2S2 <br />Nmin- <br />(d x )2 <br />• <br />where: <br />t« = one-tailed t-value with (n-1) degrees of freedom, a=0.10 <br />2 <br />s = sample variance <br />d = 0.1 (0.15 for woody plant) (level of precision or desired detectable reduction) <br />x = sample mean <br />Confidence Limits <br />Confidence limits for comparisons to reference areas and technical standards were calculated <br />using a 1-tailed t-value for alpha error probability of 0.10 at (n-1) degrees of freedom multiplied by <br />the standard error of the mean of the sampled area. <br />C. 1. = tt s <br /> Vn <br />is <br />4