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WESTERN FUELS 011 CD ACUTE JUNE 2008 <br />Program run on 07-01-2008 at 15:40:33 <br />-,SULTS CALCULATED USING THE BINOMINAL METHOD <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> <br />--------- EXPOSED <br />-------------- DEAD <br />- DEAD PROB.(PERCENT) <br /> <br />100 - <br />20 ---- <br />--------- <br />1 --------------- <br />5.00 --------------------------- <br />0.0020 <br />75 20 2 10.00 0.0201 <br />50 .20 1 5.00 0.0020 <br />25 20 0 0.00 LESS THAN 0.001 <br />12.5 20 2 10.00 0.0201 <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 />RESULTS CALCULATED USING THE PROBIT METHOD <br />--------------------------------------------------------------------------------