software used in this text is Stata, version 10 (StataCorp, 2007). It was chosen for the breadth and depth of its statistical methods, for its ease of use,
excellent graphics and excellent documentation. There are several other excellent packages available on the market. However, the aim of this text is to
teach biostatistics through a specific software package, and length restrictions make it impractical to use more than one package. If you have not
yet invested a lot of time learning a different package, Stata is an excellent
choice for you to consider. If you are already attached to a different package, you may still find it easier to learn Stata than to master or teach the
material covered here from other textbooks. The topics covered in this text
are linear regression, logistic regression, Poisson regression, survival analysis, and analysis of variance. Each topic is covered in two chapters: one
introduces the topic with simple univariate examples and the other covers more complex multivariate models. The text makes extensive use of a
number of real data sets. They all may be downloaded from my web site
at biostat.mc.vanderbilt.edu/dupontwd/wddtext/. This site also
contains complete log files of all analyses discussed in this text.