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Even though 2000 and 2001 collected data indicate that testing is not necessary, the Applicant has <br />chosen to implement the One Sample -Reverse Null Hypothesis Testing procedure (or °bio-equivalence <br />procedure") suggested by DMG to alleviate any possible concern. For this procedure, collection of an <br />"adequate° sample (where nrnin s n) is not necessary as it is in the operator's best interest to sample until <br />a 'tight" estimate of the mean is obtained (i.e., sampling should continue until the variance is "narrowly" <br />defined). <br />In the "classic" null hypothesis test, rejection of H° means failure as the hypothesis being tested is <br />that the reclaimed area variable is greater than or equal to 90°/a of the reference area or standard. <br />However, in the reverse null test, rejection of I-(, means success as the hypothesis being tested is that the <br />reclaimed area variable is less than or equal to 90°/a of the reference area or standard. Therefore, once a <br />sample has been collected from both the target area of interest and the reference area (or standard), the <br />means and variances (x and s2) of those samples will be utilized for testing revegetation success or <br />failure during that particular year. Testing would occur as follows: <br />t° - ~ S Q Where : O = 90% of the Standard <br />f <br />x =Sample mean of the reveg data <br />s =Sample Standard Deviation <br />rs =Sample Size <br />Then if ~> t for t (a=0.1,n-1 d.f.) the test is successful. <br />When this test is successful for two consecutive years for each variable of the revegetated <br />community, and The diversity numerical standards have also teen met for each year, then conditions for <br />final bond release have been met. <br />• <br />r~ <br />u <br />• <br />Q.°319Ai3 Q-°~.33.'S w1s~Q.^~:W^3@, ING Page 10 North Thanpaon Creak Mines Rise d 8 ill BorM Release EvaluaMw~ <br />