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D. magna Western Fuels 11-15-OS 1420 <br />Program run on 11-23-2005 at 11:10:01 <br />~ 'ULTS CALCULATED USING THE BINOMINAL METHOD <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED DEAD DEAD PROB. (PERCENT) <br />--------- <br />100 ---------------- <br />20 ------------- <br />4 --------------- <br />20.00 --------------------------- <br />0.5909 <br />75 20 1 5.00 0.0020 <br />50 20 0 0.00 LESS THAN 0.001 <br />25 20 1 5.00 0.0020 <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 />RESULTS CALCULATED USING THE PROBIT METHOD <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />5 1.188 1.000 3.914 0.271 <br />SLOPE = 1.773747 <br />95 PERCENT CONFIDENCE LIMITS = -.1595914 AND 3.707085 <br />LC50 = 415.6227 <br />95 PERCENT CONFIDENCE LIMITS = 147.8112 AND + INFINITY <br />LCl = 20.28532 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 42.15404 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />