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nmx-aa-42-scfi-1987

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NMX-AA-087-1995-SCFIDeterminación del error patrón.Se construye la siguiente tabla con los datos señalados en el inciso 11.7.2.TABLA 13 .- Error patrón del Log CL50Log10 No. Org . Probit calc. Fact. Pond Producto Producto ProductoConc. (X) (N) (CP) (w) (Nw) (NwX) (NwX 2 )2,0 30 5,81 0,503 15,09 30,18 60,361,698 30 5,27 0,616 18,48 31,37 53,281,397 30 4,74 0,616 18,48 25,82 36,061,096 30 4, 21 0,503 15,09 16,54 18,120,795 30 3,67 0,336 10,08 8,02 6,37SumatoriasEl error patrón se determina por la siguiente formula :SUM (Nw)= 77,2SUM(NwX)= 11,931 ∑Nw (m – z ) 2ESLog 10 CL50 = S 2 [ (_________ + _________________________) ] 0.5∑Nw ∑Nw (∑NwX 2 ) – (∑NwX) 2donde :S = 0, 563 0m = 1, 769Nw = 77, 22NwX = 111, 93NwX 2 = 174, 20Nwx 111,93Z = -------- = ------------ = 1,450Nw 77,22Sustituyendo:1 77,22 (1,769 – 1,450) 2ESLog 10 CL50 = 0,317 0[(--------------) + (---------------------------------------) ] 0.577,22 77,22 (174,20) – 15528,327, 857 984 <strong>42</strong>= 0,3170 [0,317 0 +---------------------------------] 0.5923, 404= 0,317 0 [(0,0214598 )] 0.5SUM(NwX 2= 174,20

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