One-sample t-test
In the last exercise, you used the t.test()
function to derive a confidence interval. In this exercise, you will use this function to test if the population's mean amounts to a specific value.
You can get asked about the one-sample t-test if your future role involves testing a sample against a specific benchmark.
In this exercise, you will once again work with the sleep
dataset from the datasets package.
The dataset contains the following variables:
group
- indicates which drug has been given to a patient (either1
or2
),extra
- an increase in hours of sleep compared to control.
You will perform the one-sample t-test twice - once for the first group and once for the second group.
This exercise is part of the course
Practicing Statistics Interview Questions in R
Hands-on interactive exercise
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