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table value for alpha error probability of .20, with (n-1) degrees of freedom then Ho would be <br />rejected, and revegetation would be deemed successful. <br />Were the mean allowable herbaceous cover of an adequate sample from the 2010 Phase II BRB <br />less than 90% of the cover standard (see above), then a one-sample t-test would be made in the <br />following form to test the hypothesis of reclamation success for cover (CDMG 2005 revised rule, <br />4.15.11 (2)(b)): <br />t A X <br />S- <br />x <br />Where: x = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S- = Standard error of mean [ s / In- ] <br />Y <br />S = Sample standard deviation <br />n = Sample size <br />tc = Calculated t value <br />tt =Tablet value (alpha= 0.1) see Rohlf and Sokal (1969) <br />The (traditional) null hypothesis being tested would be that the bond release block mean (µ) was <br />greater than or equal to 90% of the standard, stated as Ho: µ >_ Q. If t. was less than or equal to <br />the 1-tailed t table value for alpha error probability of 0.10, at (n-1) degrees of freedom, then Ho <br />was not rejected, and revegetation was deemed successful. <br />Climatic Data <br />Precipitation data were collected at the nearby Seneca IIW Mine during the period 1990 through <br />2010. Since the data record for Seneca IIW exists for only a relatively short period, the long term <br />average monthly precipitation data from the Western Regional Climate Center (WRCC) for the <br />nearby town of Hayden (57 years) was used as an appropriate base for comparison. Information <br />on degree-days was based on temperature data from met station 2 at the Seneca IIW Mine.