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SAMPLE ADEQUACY FORMULA <br /> 2s2 + t2 <br /> nmin = <br /> (dX)2 <br /> where nmin = the minimum adequate number of cover transects <br /> s2 = sample variance <br /> t = a designated t-statistic (two-tailed test with <br /> 80% confidence( (1.282) <br /> d = desired limits of detection (0.1 or 10%) <br /> x = sample mean <br />