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<br />cover and total production do not statistically "pass" comparability for the Juniper Woodland <br />baseline against the old Juniper Woodland reference area. This is also the case for the <br />comparability between the Old and New Juniper Woodland reference areas as indicated on Table <br />E5-1. These comparisons of the "tabular" versus "calculated" t-statistics on Table E5-1 indicate <br />"pass" or "fail" given the Students t-test indicated by the guidelines. A two-sided t-test for two <br />independent samples was considered appropriate and the decision rules for this test were: <br />If i'* >_ t (o.95,n1+n2-2) ,conclude that the two areas are unequal, and <br />If t* < t (o.9s,ni+n2-2), conclude that the two areas are equal (for a = 0.05). <br />The tabular t values for an a = 0.05 and n-2 degrees of freedom (d.f.) and calculation of <br />the comparison t* statistic for comparison are as follows: <br />New ]uniper Woodland Reference vs. Juniper Woodland Baseline <br />Variable tabular t value t* statistic <br />Total Cover 2.0244 4.9078 <br />Total Production 1.9822 0.3562 <br />• <br />Old ]uniper Woodland Reference vs. Juniper Woodland Baseline <br />Variable tabular it value t* statistic <br />Total Cover 2.0244 2.0719 <br />Total Production 1.9845 3.3545 <br />New Juniper Woodland Reference vs. Old Juniper Woodland Reference <br />Variable tabular t value t* statistic <br />Total Cover 2.0244 3.6647 <br />Total Production 1.9822 3.9820 <br />• <br />Comparison of the calculated t-statistic (t*) for the two variables with the respective tabular <br />t values indicates that in only one case t-* is less than t This results in the conclusion that the <br />total production for the ]uniper Woodland baseline study area is comoarable leauall to the <br />values obtained from the New Juniper Woodland reference area. However, because the other <br />variables are not comparable an alternate procedure involving this new reference area will be <br />necessary for revegetation success evaluations and bond release testino lsee Section 6.0). It <br />should be noted that the variability due to subpopulations of annual plants is the principal reason <br />for the statistical failures indicated above. <br />~S.II'L~~ ((;LBIEIEJK Affiffi®CIIA7f1E9~ INC. <br />10 Exhibit 5 -Vegetation Resources <br />