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Ip.. Promelas Mountian Coal Co. 1-8-03 1155 <br />Program run on 01-12-2003 at 11:47:08 <br />RESULTS CALCULATED USING <br />- THE BINOMINAL <br />--------- METHOD <br />- <br />- <br />- <br />------- <br />CONC. ---------------- <br />- <br />NUMBER ----- <br />NUMBER ------------- <br />PERCENT -------- <br />- <br />- <br />HINOMIAL --------------- <br /> EXPOSED DEAD DEAD PROB. (PERCENT) <br />-- <br />100 - - - - - <br />40 - - <br />3 ----------- <br />7.50 <br />LESS <br />THAN - - ----- <br />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 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 I5 NEGATIVE, ENTER THE DATA AGAIN <br />USING THE NUMBER ALIVE INSTEAD OF THE NUMBER DEAD. <br />RESULTS CALCULATED USING THE PROBIT METHOD <br />-------------------------------------------------------------------------------- <br />GOODNESS OF FIT <br />ITERATIONS G H CHI-SQUARE PROBABILITY <br />-------------------------------------------------------------------------------- <br />5 29.955 1.000 7.656 0.054 <br />SLOPE _ .1295189 <br />;95 PERCENT CONFIDENCE LIMITS = -.5793574 AND .8383952 <br />LC50 = 2.270966E+17 <br />95 PERCENT CONFIDENCE LIMITS = 8323.267 AND + INFINITY <br />LC1 = .2483884 <br />95 PERCENT CONFIDENCE LIMITS = 0 AND +INFINITY <br />COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE <br />REASONABLE. <br />