Laserfiche WebLink
Kent Gorham <br />June 18, 1999 <br />Page 4 <br />purposes. The Snedecor-Cochran sample adequacy formula (Equation 2) will be utilized to <br />determine that an adequate number of quadrats are sampled. <br />Post Mining Success Demonstration <br />Post mining demonstration of revegetation success for vegetative cover and production within the <br />reclaimed area will be determined through use of the One-Sample T-Test (Equation 3). This <br />statistical test is used only when the reclaimed area sample mean is less than the reference area <br />mean value. <br />(3) <br />t - Q - S <br />c <br />S- <br />s <br />Where: <br />t° = Calculated t value <br />Q = 90% of the standard <br />x = Bond release block sample mean <br />s~ = Standard error of the mean (s/,fin) <br />s = Sample standard deviation <br />n = Sample size <br />The null hypothesis being tested is that the bond release block mean (u) is greater than or equal <br />to 90% of the standard (I-I°: u s Q). If t~ is less than or equal to the 1-tailed t table value for alpha <br />error probability of .10, at the appropriate degrees of freedom, then H° is not rejected, and <br />revegetation is deemed successful for the parameter tested. <br />Species Diversity <br />The diversity of plant species in each area will be evaluated using data acquired from the 25-meter <br />point-intercept transects. Data from the transects will be analyzed by implementing Equation 4 <br />to determine the relative cover of each species detected. <br />(4) <br />Relative Cover of Species X = % Cover of Species X <br />Total [vegetative Cover <br /> <br />