4PL fit (4 parameter logistic)
This may be a naïve question but I am confused about the 4PL equation used by jmp in curve fitting. I have a dataset of two variable and I choose: analyze>modeling>nonlinearThen I plot the data and the red fit-curve button gives the option: Sigmoid curves>logistic curves>Fit logistic 4PNow my question is; the equation used by jmp is f(x).
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