_GENERAL DOCUMENTS - C1981017 (288)

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C.dubia-MidContinent-Influent-6/18/96 Program run on 07-01-1996 at 11:02: 17 RESULTS CALCULATED USING THE BINOMINAL METHOD -------------------------------------------------------------------------------- CONC. NUMBER NUMBER PERCENT BINOMIAL EXPOSED DEAD DEAD PROB. (PERCENT) -------------------------------------------------------------------------------- 100 20 15 75.00 2.0695 75 20 0 0.00 LESS THAN 0.001 50 20 1 5.00 0.0020 25 20 1 5.00 0.0020 12.5 20 1 5.00 0.0020 THE BINOMIAL TEST SHOWS THAT 75 AND 100 CAN BE USED AS STATISTICALLY SOUND CONSERVATIVE 95 PERCENT CONFIDENCE LIMITS BECAUSE THE ACTUAL CONFIDENCE LEVEL ASSOCIATED WITH THESE LIMITS IS GREATER THAN 95 PERCENT AN APPROXIMATE LC50 OF 92.55289 IS OBTAINED BY NONLINEAR INTERPOLATION BETWEEN 75 AND 100 THE MOVING AVERAGE METHOD CANNOT BE USED WITH THIS SET OF DATA BECAUSE NO SPAN PRODUCES MOVING AVERAGES WHICH BRACKET 50 PERCENT DEAD AND ALSO USES TWO CONCENTRATIONS WHICH HAVE PERCENT DEAD BETWEEN 0 AND 100 PERCENT. RESULTS CALCULATED USING THE PROBIT METHOD -------------------------------------------------------------------------------- GOODNESS OF FIT ITERATIONS G H CHI-SQUARE PROBABILITY -------------------------------------------------------------------------------- 4 7.754 8.574 25.722 LESS THAN 0.001 BECAUSE THE PROBABILITY IS LESS THAN 0.05, RESULTS CALCULATED USING THE PROBIT METHOD PROBABLY SHOULD NOT BE USED. SLOPE = 2.492143 95 PERCENT CONFIDENCE LIMITS = -4.447277 AND 9.431563 LC50 = 123.9173 95 PERCENT CONFIDENCE LIMITS = 0 AND +INFINITY LC1 = 14.44369 95 PERCENT CONFIDENCE LIMITS = 0 AND 59.42133 COMPARE RESULTS WITH ORIGINAL DATA TO SEE IF THEY ARE REASONABLE. COMMERCIAL TESTING & ENGINEERING CO. F466 Original Watermarked For Your Protection