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<br />Reveaetation Year Reference Area tabular tvalue t* statistic <br />Grassland 2006 Grassland Ref. Area 1.3095 13.5417 <br />Riparian 2006 Riparian Ref. Area 1.3077 11.0220 <br />Comparison of the calculated t-statistic (t*) for the respective reference area with the respective <br />tabular tvalue indicates that in each case C is equal to or greater than t. This results in the conclusion <br />that the oertormance standard was met at the required significance level of a = 0.1 for both reveaetation <br />areas in 2006. <br />3.3 Total Herbaceous Production <br />Total herbaceous production is another of the main variables that must pass revegetation success <br />evaluations in both community types in accordance with Rule 3.03. Review of Table 1 and Chart 2 <br />indicates that total herbaceous production for both revegetated areas substantially exceeds 90°l0 of the <br />value for the analogous reference area in 2006. These comparisons are most readily evident on Chart 2; <br />however, comparisons of the "tabular" versus "calculated" t-statistics on Table 1 also indicate strong <br />success given the "reverse-null hypothesis t-test" indicated by the guidelines. The decision rules for this <br />test were: <br />If t" < til-o;"-i m.i ,conclude failure to meet the performance standard, and <br />If t" ? ttl-o;°-1 m,~, conclude that the performance standard was met (for a = 0.1). <br />The tabular t values for an a = 0.1 and n-1 degrees of freedom (df.) and calculation of the <br />comparison t* statistic for each community type for the 2006 comparisons are as follows: <br />Reveaetation Year Reference Area tabular tvalue t* statistic <br />Grassland 2006 Grassland Ref. Area 1.2951 11.3825 <br />Riparian 2006 Riparian Ref. Area 1.2963 4.1980 <br />Comparison of the calculated t-statistic (f') for the respective reference area with the respective <br />tabular tvalue indicates that in each case l° is equal to or greater than t. This results in the conclusion <br />that the certormance standard was met at the required significance level of a = 0.1 for both reveaetation <br />areas in 2006. <br />CEDAR CREEK ASSOCIATES, INC. Page 11 Blue Ribbon Mine - 2006 <br />Phase III Bond Release Evaluation <br />