R is a language and environment for statistical computing and graphics which provides a wide variety of statistical techniques, including linear and nonlinear modeling, classical statistical tests, timeseries analysis, classification, clustering, etc. The program uses graphical techniques, and is highly extensible. R is similar to the S language and environment developed at Bell Laboratories (now Lucent Technologies), and most S code also runs in R.
R is available as Free Software under the terms of the Free Software Foundation’s GNU General Public License in source code form. It compiles and runs on a wide variety of platforms, including Window,s MacOS, UNIX, FreeBSD, and Linux.
Tutorials  Paired Sample T Test
Tutorials  One Sample T Test
Tutorials from Universities
Tutorials  Independent Samples TTest
Tutorials  OneWay ANOVA
Tutorials  More OneWay ANOVA
Tutorials  Chi Square
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