Probitw {ecotoxicology} | R Documentation |
Returns the weighting coefficient from expected probit
Probitw(Y, C = 0)
Y |
numeric, expected probit |
C |
numeric, proportion of natural mortality |
the weighting coefficient
Jose Gama
Finney D. J., 1964 Probit analysis: a statistical treatment of the sigmoid response curve. Cambridge University Press. Formula 6.3.
# Example from page 90 of Finney 1964: # expected probit Y = 6.2, control mortality C = 59% Y <- 6.2 C <- 0.59 # weighting coefficient = 0.141 Probitw(Y,C)