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Appendix A - Vegetation Sampling for Phase III Bond Release <br />is Step 2: Satterthwaite Degrees of Freedom <br />{' SE.,.' <br />dfsar - (SEbra + (.9 * SE,ef )a ) <br />nbr - I nref - 1 <br />Where: <br />SEbr = (s /-,In-) br = Bond release area standard error <br />SEref = (s l v n ),e f = Reference area standard error <br />Step 3: Reverse Null, two sample, 1-tailed t-test, using the Satterthwaite Standard Error with Satterthwaite <br />Corrected Degrees of Freedom <br />Ho : Ubr - (.9 * U,ef) < 0 <br />H, : Ub, - (.9 * Uref ) > 0 <br />The null hypothesis is that the bond release area population mean is less than or equal to 90% of the <br />reference area population mean. <br />• If the null hypothesis is rejected, reclamation is successful for the parameter in question. <br />Step 3 (continued): <br />Calculated t-value: <br />Where: <br />xb, <br />f -(.9*z7ef) <br />= <br />SE,w <br />zb, = Bond release area sample mean <br />x,, = Reference area sample mean <br />The analysis conducted with a sample size of 90, which assumes each quadrat on each transect is an <br />independent observation, rejected the null hypothesis that the bond release population mean is less than or <br />equal to 90% of the reference area population mean. The analysis conducted on the 15 transects, which <br />assumes the average of the six quadrats for each transect is an independent observation, also rejected the <br />null hypothesis of this test (see results section). Thus, both tests support that production during 2005 on <br />the rangeland reclaimed areas was successful. <br />In 2006, one herbaceous production sample was collected on each of 30 transects in the four sample areas <br />2215 GoldenEa& PH3BOND 2006 3-10-08.doc A-5