Two-sample t-tests are statistical tests used to compare the means of two populations. Also known as Student’s t-tests, their results are used to determine if there is a significant difference between ...

The data are provided in the Analyst Sample Library. To access this Analyst sample data set, follow these steps: The test of interest is whether the difference of the means is zero. This is the ...

When it is not feasible to assume that two groups of data are independent, and a natural pairing of the data exists, it is advantageous to use an analysis that takes the correlation into account.