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Western Fuels Effluent 007 Daphnia magna Acute May 2006 <br />gram run on 06-19-2006 at 16:46:39 <br />RESULTS CALCULATED USING THE BINOMINAL METHOD <br />--------- <br />CONC. ---------------- <br />NUMBER ------------- <br />NUMBER --------------- <br />PERCENT --------------------------- <br />BINOMIAL <br /> <br />------ <br />-- EXPOSED <br />-- DEAD DEAD PROB.(PERCENT) <br />---------------- <br />- <br />100 -------------- <br />20 ------------- <br />1 --------------- <br />5.00 ----------- <br />0.0020 <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 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 />THE PROBIT SLOPE IS NEGATIVE, ENTER THE DATA AGAIN <br />NG 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 3.758 1.000 4.409 0.221 <br />SLOPE _ -.7831064 <br />95 PERCENT CONFIDENCE LIMITS = -2.301166 AND .7349531 <br />LC50 = .1347243 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 5.304254 <br />LC1 = 125.9074 <br />95 PERCENT CONFIDENCE LIMITS = 28.47914 AND + INFINITY <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />• <br />f~ <br />