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sample one -sided t -test with alpha error probability of 0.20, in conformance with DRMS <br />Regulation 4.15.11(2)(c). The following form of the West will be used : <br />= s — Q <br />S <br />Where: <br />s = Bond Release Block Sample Mean <br />Q = 90% of Standard <br />S_ = Standard error of mean <br />S j = Sample standard deviation <br />n = Sample size <br />t, = Calculated t value <br />t, = Table t value <br />The null hypothesis being tested is that the mean value at the site vear averace is less than <br />or equal to Q, with 80% statistical confidence. If t� is greater than the 1- tailed t table value for <br />alpha error probability of 0.20, at n -1 degrees of freedom (infinite degrees of freedom may be <br />used if n > 30), then the null hypothesis is rejected, and revegetation is deemed successful for <br />the parameter in question. <br />4) If sample adequacy is not achieved in the site vear averace success will be demonstrated <br />by use of the two- sample "reverse null' t -test with Safterthwaite approximation of standard error <br />and degrees of freedom. The test can be used if the following 2 conditions are met: 1) a <br />minimum of 30 sample observations are taken in the reclaimed area and also in the reference <br />area, and 2) the reclaimed area sample mean is greater than Q. <br />To use this test, first the Satterthwaite standard error is calculated as <br />PR -06 May 2010 2.05.4)2)(e) - 44 <br />