May 2019
Beginner to intermediate
266 pages
5h 57m
English
Content preview from Hands-On Exploratory Data Analysis with R
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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 the t-test using the t.test() command.
The following command is used for our GlassDataset dataset to check the parameters of patients with a specific age range who have undergone a biopsy test:
> t.test(GlassDataset$RI, GlassDataset$Type)Welch Two Sample t-testdata: GlassDataset$RI and GlassDataset$Typet = -8.7756, df = 213, p-value = 5.559e-16alternative hypothesis: true difference in means is not equal to 095 percent confidence ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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