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d.magna-Western Fuels-5/13/03 <br />Program run on OS-19-2003 at 08:47:20 <br />RESULTS CALCULATED USING THE BINOMINAL METHOD <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br />EXPOSED DEAD DEAD <br />- <br />------------ PROB. (PERCENT) <br />-- <br />-- <br />- <br />-------------- <br />-------------- <br />-------------- <br />100 20 0 0.00 --- <br />-- <br />--------------- <br />LESS THAN 0.001 <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 1 5.00 0.0020 <br />AT A CONFIDENCE LEVEL OF 95 PERCENT, THE BINOMIAL TEST <br />SHOWS THAT T1iE 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 SEEN 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 Ib'STEAD OF THE NUMBER DEAD. <br />...iEN THERE ARE LESS THAN TWO DIFFERENT CONCENTRATIONS AT <br />WHICF( THE PERCENT DEAD IS BETWEEN 0 AND 100, T1iE PROBIT <br />tdETHOD CANNOT GIVE ANY STATISTICALLY SOUND RESULTS. <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />