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_ SFNf BY~ 8- 4-93 ;12~42PM ; CAN4NIE f7rGI.J:7900U+ ;tf 7/19 <br />• <br />t <br />2 <br />2.0 CALCULATE AVERAGES, STANDARD DEVIATIONS AND <br />EXPECTED RANGES <br />Table t lists sample averages, standard devlavpns, and expected ranges 1'or each <br />parameter by Iccatlon. Expected ranges are based on the average plus or minus 3 <br />standard deviations. For normally distributed date, this range should encompass 99 <br />percent of expected data. Minimums that were calculated to be less than .zero are <br />indicated in Table 1 as ND (not detected). <br />The tables included (n Appendix A have calculated averages and standard deviations <br />far each month. For data with greater than 60 percent nondetect analyses, average <br />values and standard deviations were not calculated because concentrations are not <br />normally distributed. Calculated ranges are listed by month on data sheets included <br />In Appendix A. <br />,~wnw~,arenwnusrr wo.,.,.rn <br />