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Western Fuels 007 DM Acute Nov 2006 <br />' Program run on 11-13-2006 at 11:22:27 <br />CULTS CALCULATED USING THE BINOMINAL METHOD <br />' CONC.---- -----NUMBER---- ----NUMBER---- ----PERCENT--- ----BINOMIAL---------------- <br /> <br />--- EXPOSED DEAD DEAD PROB. (PERCENT) <br />---- <br />100 --------------- <br />20 -------------- <br />0 -------------- <br />0.00 ---------------------------- <br />LESS THAN 0.001 <br />75 20 0 0.00 LESS THAN 0.001 <br />50 20 1 5.00 0.0020 <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 />WnEN 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 />~~ <br />