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?. <br /> <br />New i~orizon Mme: 2x07 Vegetation Sampling for Phase 3 Bond rtetease <br />other statistical test far demonstration of successful revegetation regarding cover in the Phase 3 <br />Irrigated pasture reclaimed areas. <br />Production. Because 't) sample adequacy was not demonstrated in the reference area but <br />was demonstrated in the recaimed area, 2) the reclaimed area mean exceeds the standard, <br />and 3) a minimum of 30 samples were taken in each area, the two-sample reverse-nuii test <br />(statistical procedure #4) was used to compare the means. To use this test, first the <br />Satterthwaite standard error is calculated as <br />i <br />Equation 2 (~~5~~ <br />. lw'. <br />where: <br />SEA = Satterthwaite-approximated Standard Error <br />s~, =bond release site {reclaimed site) sample standard deviation <br />s,~, =reference area sample standard deviation <br />n~, =bond release stte (reclaimed site) sample size <br />n,~ =reference area sample size <br />Next, the Satterthwaite degrees of freedom are calculated as <br />Equation 3 ~ = ~}~ <br />where: <br />df$~, = Satterthwaite-approximated degrees of freedom <br />t.astly, a one-sided reverse-nuii t-test with alpha = 0.20 is used as follows: <br />Equation 4 r_'~M__ -~f~~x„~~ <br />where: <br />t =calculated t-value <br />X~ =band release site {reclaimed site) sample mean <br />X,~ =reference area sample mean <br />The nu11 hypothesis being tested is that the mean value for the reclaimed site is less than or <br />equal to Q. If the null hypothesis is rejected vegetation is successful. <br />B(O-Logic Envtronmenrat <br />IVovernCer 42, 2f307 <br />Attachment 1-8 <br />