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Western Fuels 007 DM Acute Sampled 9/5/2006 <br />Program run on 09-12-2006 at 11:23:51 <br />ULTS CALCULATED USING THE BINOMINAL METHOD <br />------------------------------------------ <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> <br />----- EXPOSED <br />--- DEAD DEAD PROB. (PERCENT) <br />- <br />--- <br />100 - <br />------------ <br />20 ------------- <br />0 --------------- <br />0.00 --------------------------- <br />LESS THAN 0.001 <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 1 5.00 0.0020 <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 /> <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />-------------------------------------------------------------------------------- <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />-------------------------------------------------------------------------------- <br />5 190.667 1,000 3.515 0.319 <br />SLOPE = 9.944133E-02 <br />95 PERCENT CONFIDENCE LIMITS = -1.273668 AND 1.47255 <br />LC50 = 1.691595E+19 <br />95 PERCENT CONFIDENCE LIMITS = 596.3527 AND + INFINITY <br />LC1 = 6.832873E-05 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 24.62472 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />• <br />~~ <br />