Laserfiche WebLink
C.dubia-MidContinent-Effluent-6/18/96 <br /> Program run on 07-01-1996 at 11:12:02 <br /> RESULTS CALCULATED USING THE BINOMINAL METHOD <br /> -------------------------------------------------------------------------------- <br /> CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED DEAD DEAD PROB. (PERCENT) <br /> -------------------------------------------------------------------------------- <br /> 100 20 2 10.00 0.0201 <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 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 /> WHEN 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 /> COMMERCIAL TESTING & ENGINEERING CO. <br /> Original <br /> Original Watermarked For Your Protection <br />