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  1. M

    Starting Values for a non-linear regression

    Hi I am trying to get the starting values for non-linear regression of a data set that follows a weibull function. I tried to do the OLS regression of this equation: log(log(1-F(t)))=-Beta(log(lambda))-Beta(log(t)) to get the starting values. The only problem is that F(t) is greater than 1...
  2. M

    Comparing two non-linear models

    I have a non-linear model and I would like to determine if there is a difference between two treatments. Would it be robust to add in treatment as a dummy variable into the model. Where a value of 1 would represent treatment A and a value of 0 would represent treatment B. Then if the treatment...
  3. M

    cross-tabs or non-parametric independent sample t-test

    I have conducted a survey to determine if there is a significant difference in the number farmers and non-farmers which agree to a specific farming policy. I have two variables. One variable identifies if the survey respondent is either a farmer or not. The other variable is binary and will...