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in-LERnounrainlOiL% <br /> 4 <br /> Sample Adequacy. For each vegetation characteristic measured, statistical <br /> sample adequacy was calculated as shown below: <br /> N 2t2s2 <br /> min. _ <br /> (0.1x72 <br /> where Nmin. = minimum number of samples required to detect a ten <br /> percent change in the mean at a given level of <br /> confidence <br /> t = value of double-tail "t" for the degrees of freedom and <br /> desired level of confidence <br /> s = standard deviation of the sample population <br /> x = sample mean <br />