The data set Soybean.csv is the modified Soybean data set in the R nlme library. I wish to test the effect of the fixed effect Svariety which is a factor with three levels allen, fowler and glenn. In other words, I wish to investigate the effect of Svariety on the individual parameters i.e. beta, theta and lambda. The file project.R contains the R code, whereby the self-starting three parameter logistic model SSlogis is used. First concern, what is the meaning of the intercept term? What is the meaning of the parameter estimates? How do I compare variety allen with variety glenn for example? Since there are three levels, how many comparisons can I possibly have? Thank you in advance for your help. I believe email has been sent out more than once, I am so sorry for the mix-up.
Meaning of parameter estimates in nlme output
1 message · Juliet Ndukum