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1 <br />' AOOendu A - 7998 & 1997 VcRefatiort Snmp(inR Oma <br />' (3) <br />tZ SZ <br />Nmin = <br />(dx)z <br />Where: <br />' N required number of transects or quadrants. <br />d desired level of precision (0.1 the level of precision for estimate of <br />the mean to be within 10% of the actual mean). <br />' x sample mean <br />SZ - sam le variance <br />' P ~ ~ a t = thew = .1 ~t-table value for a single tailed t-test with n-1 degrees <br />of freedom. <br />' Shrub density was sampled by counting all individual shrub stems within a 25 square meter <br />quadrant. A random number between one and fifty was selected to determine where the sampling <br />point would be placed along the fifty meter transect. <br /> <br />1 <br /> <br />1 <br />1 <br />1 <br /> <br />1 <br /> <br /> <br />1 <br />The statistical analysis used with this parameter was developed by Larry Routten of the CDMG, <br />pursuant to phone conservations in August, 1997. A nonparametric procedure for estimating a <br />ranking was implemented due to the assumption that our data may or may not follow a normal <br />distribution. A lower confidence interval was developed for a ranking analogous to the median. <br />The data was ordered from smallest to largest with a mean and median calculated. The data was <br />ordered using the ranking methodology in Quattro Pro V.6. A lower confidence interval of the <br />mean was calculated using Equation 4. The lower confidence interval was interpolated to test a - <br />null hypothesis in which the mean or median significantly exceeds the success standard at the 90% <br />confidence level. <br />(4) <br />! = P(n+l)-Z(_rtlnP(1-P)](a <br />Where: <br />1 = lower confidence limit <br />p = desired level of precision about the pth quantile (0.1 the level of <br />precision for estimate of the mean to be within 10% of the actual <br />mean) <br />Z = is the pth quantile of the standard normal distribution <br />n = number of samples <br />Post mining demonstration of revegeta[ion success for vegetative cover in the Phase I, II, III, and <br />IV reclaimed areas was determined through the use of the Student t-Test (Equation 5). This <br />A-2 <br /> <br />