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d.magna-Mountain Coal Co.-10/04/99 <br />Program run on 10-OS-1999 at 12:47:25 <br />RESULTS CALCULATED USING THE <br />-------------------------- <br />C. NUMBER <br />EXPOSED <br />BINOMINAL METHOD <br />NUMBER <br />DEAD <br />100 20 0 <br />75 20 0 <br />50 20 0 <br />25 20 0 <br />12.5 20 0 <br />PERCENT BINOMIAL <br />DEAD <br />-- <br />---- PROB.(PERCENT) <br />- <br />---- <br />--- <br />-- <br />--- <br />--- <br />0.00 --- <br />---- <br />LESS THAN --- <br />--------- <br />0.001 <br />0.00 LESS THAN 0.001 <br />0.00 LESS THAN 0.001 <br />0.00 LESS THAN 0.001 <br />0.00 LESS THAN 0.001 <br />AT A CONFIDENCE LEVEL OF 95 PERCENT, THE BINOMIAL TEST <br />SHOWS THAT THE LC50 IS ABOVE 100 <br />NO METHOD CAN CALCULATE AN LC50 IF THE PERCENT DEAD <br />IS THE SAME AT ALL TESTED CONCENTRATIONS. <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br /> <br />• <br />