May 2019
Beginner to intermediate
266 pages
5h 57m
English
Content preview from Hands-On Exploratory Data Analysis with R
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Directional hypothesis in R
In this hypothesis testing, you can only specify a direction to the dataset mentioned previously. Here, we will use the same function with the alternative equal to (=) instruction to switch the emphasis from a two-sided test (the default) to a one-sided test. The choices that we can have are two.sided, less, or greater, and the choice can be abbreviated, as shown in the following command:
> t.test(longley$GNP, mu = 5, alternative = 'two.sided')One Sample t-testdata: longley$GNPt = 15.401, df = 15, p-value = 1.337e-10alternative hypothesis: true mean is not equal to 595 percent confidence interval:334.7346 440.6623sample estimates:mean of x387.6984> t.test(longley$Unemployed, mu = 5, alternative = 'two.sided')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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