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96 Hour Acute WET - Pimphales promelas <br />Program run on 01-18-2006 at 14:19:25 <br />T"'SULTS CALCULATED USING THE BINOMINAL METHOD <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED <br />-- <br />-- <br />- DEAD <br />--- <br />--- <br />- DEAD <br />- PROB. (PERCENT) <br />--------- <br />100 ----- <br />--- <br />-- <br />40 --- <br />---- <br />0 ------ <br />-------- <br />0.00 -------- <br />LESS ------------------- <br />THAN 0.001 <br />75 40 0 0.00 LESS THAN 0,001 <br />50 40 1 2.50 LESS THAN 0.001 <br />25 40 0 0.00 LESS THAN 0.001 <br />12.5 40 0 0.00 LESS THAN 6,001 <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 />lvnEN THERE ARE LESS THAN TWO DIFFERENT CONCENTRATIONS AT <br />WHICH THE PERCENT DEAD IS BETWEEN 0 AND 100, THE PROBIT <br />METHOD CANNOT GIVE ANY STATISTICALLY SOUND RESULTS. <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />~, <br />V <br />