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suggested by DMG. For this procedure, collection of an "adequate" sample (where r;,,;n s n) is not <br />necessary as ft is in the operator's best interest to sample until a "tight" estimate of the mean is obtained <br />(i.e., sampling should continue until the vaziance is "narrowly" defined). <br />In the "classical" 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% of the reference area or standard. <br />However, in the revere null test, rejection of h!p means success as the hypothesis being tested is that the <br />recaimed area variable is less than or equal to 90% 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 (z and s2) of those samples will be utilized for testing revegetation success or <br />failure during that parfiwlaz year. Testing would occur as follows: <br />t~ _ ~ SQ Where: Q=90ge of the Standard <br />f <br />s =Sample mean of the reveg data <br />s =Sample Standard Deviation <br />n =Sample Size <br />Then if t°> t for t (ar0.1,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 been met for each year, then conditions for <br />final bond release have been met. <br />67~piB Q'.lQ~ A~ID¢.'¢~ER6, uac. Page 9 North Thompson Credo Mines Phase II a III aend Rdeasa Evduatbn <br />