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Table 1. Recozd of measurements--Coots Keenesburg Mine <br />Area sampled: ^ <br />Subsite: <br />Date; <br />Observer: <br />Attribute measured: <br />Sample size (n) .............................................. <br />Mean (x) ..................................................... <br />Sum of squares (Sx2) ......................................... <br />Variance of sample (sx2 - Sx2 / n-1) ......................... <br />Standazd deviation (sx) ...................................... <br />Standard error (s-) .......................................... <br />x <br />• Coefficient of variation (CV ~ 100 (sx / z )) ................ <br />Confidence limits (CL~ ~ z ± t sx)* ....................upper <br />lower <br />CL90 .................................upper <br />lower <br />CL80 .................................upper <br />lower <br />* iihere t is the tabular value at n-1 degrees of freedom and the designated <br />level of probability. It is anticipated that CL may be needed at 9990, <br />90;~ or 80;5 probability, depending on the statistical test to be <br />calculated. <br /> <br />l 5 <br />