Laserfiche WebLink
<br />' p.promelas-Mountain Coal Co.-5/2/00 <br /> Program run on 05-08-2000 at 08:05:39 <br />i <br />i RESULTS CALCULATED USING THE BINOMINAL METHOD <br /> CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED DEAD DEAD PROB.(PERCENT) <br /> 100 40 0 0.00 LESS THAN 0.001 <br /> 75 40 0 0.00 LESS THAN 0.001 <br /> 50 40 0 0.00 LESS THAN 0.001 <br /> 25 40 0 0.00 LESS THAN 0.001 <br /> 1.9 40 1 2.50 LESS THAN 0.001 <br /> AT A CONFIDENCE LEVEL OF 95 PERCENT, THE BINOMIAL T EST <br />_. SHOWS THAT THE LC50 IS ABOVE 100 <br />-I THE USEFULNESS OF ANY LC5 0 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 /> <br /> <br /> <br />J <br />