7. Which software to use for statistical analyses?
Statistical programmes, such as the freeware R and its packages, as well as other packages such as Minitab, SPSS, and SAS, can handle the analyses described in this paper. There are several sites comparing the different packages: http://en.wikipedia.org/wiki/Comparison_of_statistical_packages
Although spreadsheet software has improved and many statistical tests are available, they often lack good diagnostics on the model fit and checks for the appropriateness of the statistical test.