SR Mills says to consider Stata as an alternatives. I would be interested in a point by point comparison of STATA to SPSS. Stata does better with complex samples and weighting than SPSS version 11. What are other differences? Alan C. Acock
I've found that Stata has many routines and functions that are helpful in biostatistics. For example, I like its logistic regression programs, generalized linear regression, and generalized estimating equations. I also like its capacity to implement fractional polynomials. Stata has an incredibly active users group that regularly contributes new programs. You can routinely update/upgrade your version of Stata via the internet. Stata's technical support is fantastic. Stata is relatively inexpensive for all that you get.
SR Millis
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