The basic scenario is best explained by example. In most cases the t-test is used when you want to compare the means (averages) of two groups in situations where you only have samples of the two groups under investigation. One of the most fundamental types of R analysis is the t-test. Although R has been around for many years, interest in R among software developers has increased significantly over the past couple of years, perhaps in part because R has been adopted by Microsoft as part of its technology stack. The R system consists of a scripting language, an interactive command shell and a large library of mathematical functions that can be used for data analysis.
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