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~P.promelas-Mountain Coal Co.-1/21/00 <br />Program run on OS-25-2000 at 09:26:16 <br />RESULTS <br />- CALCULATED USING <br />-- THE BINOMINAL <br />-- <br />--- <br />-- <br />- METHOD <br />------ <br />-CONC. ------------- <br />-- <br />NUMBER -- <br />- <br />--- <br />- <br />NUMBER -------------- <br />PERCENT <br />~ EXPOSED DEAD DEAD <br />.i <br />100 40 4 10.00 <br />75 40 0 0.00 <br />50 40 0 0.00 <br />' 25 40 0 0.00 <br />BINOMIAL <br />PROB. (PER <br />LESS THAN <br />LESS THAN <br />LESS THAN <br />LESS THAN <br />ENT) <br />0.001 <br />0.001 <br />0.001 <br />0.001 <br />1.9 40 4 10.00 LESS THAN 0.001 <br />fi <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 />'~ <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />ITERATIONS G H CHI-SQUARE <br />----------------------------------------------------------- <br />5 27.115 4.421 13.264 <br />BECAUSE THE PROBABILITY IS LESS THAN 0.05, RESULTS <br />CALCULATED USING THE PROBIT METHOD PROBABLY SHOULD NOT <br />~BE USED. <br />u <br />i~ SLOPE _ -.3026343 <br />95 PERCENT CONFIDENCE LIMITS = -1.878504 AND 1.273235 <br />LC50 = 3.589758E-05 <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />95 PERCENT CONFIDENCE LIMITS = 0 AND 3.939268 <br />LC1 = 1745.42 <br />~95 PERCENT CONFIDENCE LIMITS = 0 AND +INFINITY <br /> <br />GOODNESS OF FIT <br />PROBABILITY <br />0.004 <br />1 <br />t~ <br />