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D. Magna Western Fuels 7-20-04 1335 <br />Program run on 07-27-2004 at 11:34:55 <br />Rn~ULTS CALCULATED USING THE BINOMINAL METHOD <br />- ------ <br />CONC. --------------- <br />NUMBER -------------- <br />NUMBER -------------- <br />PERCENT ---------------------------- <br />BINOMIAL <br /> EXPOSED DEAD DEAD PROB. (PERCENT) <br />--------- <br />100 --------------- <br />20 -------------- <br />1 -------------- <br />5.00 ---------------------------- <br />0.0020 <br />75 20 0 0.00 LESS THAN 0.001 <br />50 20 0 0.00 LESS THAN 0.001 <br />25 20 0 0.00 LESS THAN 0.001 <br />12.5 20 0 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 />THE USEFULNESS OF ANY LC50 CALCULATED FROM THIS SET OF DATA <br />IS QUESTIONABLE BECAUSE A CONCENTRATION-EFFECT RELATIONSHIP <br />HAS NOT BEEN DEMONSTRATED OVER A REASONABLE RANGE (e.g. <br /><37 TO>63 OF PERCENT DEAD <br />NEITHER THE APPROXIMATE LC50 CALCULATION NOR THE MOVING <br />AVERAGE METHOD CAN BE USED WITH THIS SET OF DATA. <br />EITHER THE HIGHEST CONCENTRATION KILLED LESS THAN 50 <br />PERCENT OR THE LOWEST KILLED MORE THAN 50 PERCENT. <br />IF THE PROBIT SLOPE IS NEGATIVE, ENTER THE DATA AGAIN <br />USING THE NUMBER ALIVE INSTEAD OF THE NUMBER DEAD. <br />1,..~N THERE ARE LESS THAN TWO DIFFERENT CONCENTRATIONS AT <br />WHICH THE PERCENT DEAD IS BETWEEN 0 AND 100, THE PROBIT <br />METHOD CANNOT GIVE ANY STATISTICALLY SOUND RESULTS. <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />