I was asked by my boss to do an analysis on a large data set, and I am trying to convince him to let me use R rather than SPSS. I think Sweave could make my life much much easier. To get me a little closer to this goal, I ran my analysis through R and SPSS and compared the resulting values. In all but one case, they were the same. Given the matrix
[,1] [,2] [1,] 110 358 [2,] 71 312 [3,] 29 139 [4,] 31 77 [5,] 13 32 This is the output from R: > chisq.test(test29) Pearson's Chi-squared test data: test29 X-squared = 9.593, df = 4, p-value = 0.04787 But, the same data in SPSS generates a p value of .051. It's a small but important difference. I played around and rescaled things, and tried different values for B, but I never could get R to reach .051. I'd like to know which program is correct - R or SPSS? I know, this is a biased place to ask such a question. I also appreciate all input that will help me use R more effectively. The difference could be the result of my own ignorance. thanks --andy -- Insert something humorous here. :-) ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.