Hands-On Exploratory Data Analysis with R

t-test in R

This is also referred to as the student's t-test, which is a method for comparing two samples. It can usually be implemented to determine whether the samples are proper or different. This is considered a parametric test, and the data should be distributed normally.

R can handle the various versions of t-test using the t.test() command.

The following command is used for our Autompg dataset to check the parameters of displacement, weight, and acceleration, which are regarded as crucial elements to perform the hypothesis test error analysis:

> > t.test(Autompg$displacement, Autompg$weight)Welch Two Sample t-test                                                            data: Autompg$displacement and Autompg$weight                              t = -64.93, df = 409.03, p-value < 2.2e-16               alternative hypothesis: ...