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• <br />• <br /> <br />Where: n =the number of actual samples collected with a minimum of 15 in each unit; <br />t =the value from the t distribution for 90% confidence with n-1 degrees of freedom; <br />a 2 =the variance of the estimate as calculated from the initial samples; <br />x =the mean of the estimate as calculated from the initial samples. <br />If the initial minimum number of samples in each area did not provide a suitable estimate of the <br />mean (i.e., the inequality was false), additional samples were collected until the inequality (nmtn s n) <br />became true. <br />~R16N6 ~181®S A1A0~1Q6fftiD, INC. <br />Page 12 Exhibit 5-Bowie Baseline Vegetation Survey <br />