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Western Fuels 011 Pp Acute March 2009 <br />Program run on 03-23-2009 at 11:55:44 <br />RESUIrTS CALCULATED USING THE BINOMINAL METHOD <br />- -------------- <br />------------------------------------------------- <br />cu.-C. NUMBER NUMBER PERCENT BINOMIAL -------------- <br />EXPOSED DEAD DEAD PROB.(PERCENT) <br />------------- <br />----------------------------------------------------- <br />100 40 14 35.00 4.0345 -------------- <br />75 40 2 5.00 LESS THAN 0.001 <br />50 40 5 12.50 LESS THAN 0.001 <br />25 40 0 0.00 LESS THAN 0.001 <br />12.5 40 1 2.50 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 />RESULTS CALCULATED USING THE PROBIT METHOD <br />--------------------------------------------------------------------------------- <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />--------------------------------------------------------------------------------- <br />5 2.904 3.574 10.721 0.013 <br />BECAUSE THE PROBABILITY IS LESS THAN 0.05, RESULTS <br />CALCULATED USING THE PROBIT METHOD PROBABLY SHOULD NOT <br />BE USED. <br />SLOPE = 2.048065 <br />95 PERCENT CONFIDENCE LIMITS = -1.442335 AND 5.538465 <br />LC50 = 215.8344 <br />95 PERCENT CONFIDENCE LIMITS = 82.46868 AND + INFINITY <br />LC1 = 15.78585 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 45.33055 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE.