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n = Sample size <br />t, = Calculated t value <br />tt = Table t value (alpha = 0.2) see Rohlf and Sokal 1969 <br />If tc was greater than the 1 -tailed t table value for alpha error probability of .20, with (n-1) degrees <br />of freedom then Ho would be rejected, and revegetation would be deemed successful. <br />Were the mean allowable herbaceous cover of an adequate sample from the 2014 Phase II BRB <br />PSCM-3 to be less than 90% of the cover standard (see above), then a one -sample t-test (using <br />the reverse null hypothesis, stated as Ho: µ <_ Q) would be made. The test of the hypothesis of <br />reclamation success for cover (CDMG 2005 revised rule, 4.15.11 (2)(b)) would take the following <br />form: <br />t _ X <br />S - <br />x <br />Where: x = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S_ = Standard error of mean I s / V_n ] <br />x <br />S = Sample standard deviation <br />n = Sample size <br />t, = Calculated t value <br />tt = Table t 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 />statistically indistinguishable from 90% of the standard, stated as Ho: µ >_ Q. If the absolute value <br />of t, was less than or equal to the one -tailed t table value for alpha error probability of 0. 10, at (n- <br />1) degrees of freedom, then Ho was not rejected, and revegetation would be deemed successful. <br />Climate Data <br />Seneca Coal Company historically provided precipitation and temperature data for the Seneca II <br />and IIW Mines. However since late 2010, data collection there ended. For purposes of providing <br />climate data for the year, long-term average monthly precipitation data from the NOAA <br />6 <br />