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~.promelas-Mountain Coal Co; ,;/2/00 t. <br />Program run on 08-07-2000 at 10:24:28 <br />:ESULTS CALCULATED USING THE BINOMINAL METHOD <br />CONC. NUMBER NUMBER PERCENT BINOMIAL <br /> EXPOSED DEAD.. DEAD PROB. (PERCENT) <br />100 40 10 25.00 0.1111 <br />75 40 7 17.50 0.0021 <br />50 40 3 7.50 LESS THAN 0.001 <br />25 40 1 2.50 LESS THAN 0.001 <br />1.9 40 0 0.00 LESS THAN 0.001 <br />e,T A CONFIDENCE LEVEL OF 95 PERCENT, THE'BINOMIAL TEST <br />SHOWS THAT THE LC50 IS ABOVE 100 <br />CHE 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 />~.VERAGE METHOD CAN BE USED WITH THIS SET OF DATA. <br />3ITHER 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 />7SING THE NUMBER ALIVE INSTEAD OF THE NUMBER DEAD. <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />=------=---------=----------------------------------- <br />ITERATIONS G H CHI-SQUARE <br />5 0.422 1.000 0.122 <br />SLOPE = 2.249643 <br />95 PERCENT CONFIDENCE LIMITS = .787.4508 AND 3.711836 <br />LC50 = 200.5174 <br />95 PERCENT CONFIDENCE LIMITS = 125.6091 AND 1509.975 <br />LC1 = 18.53861 <br />95 PERCENT CONFIDENCE LIMITS = 1.532696 AND 32.47837 <br />GOODNESS OF FIT <br />PROBABILITY <br />0.989 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />