Machine Learning for OpenCV

Implementing Student's t-test

One of the most famous statistical tests is Student's t-test. You might have heard of it before: it allows us to determine whether two sets of data are significantly different from one another. This was a really important test for William Sealy Gosset, the inventor of the test, who worked at the Guinness brewery and wanted to know whether two batches of stout differed in quality.

Note that Student here is capitalized. Although Gosset wasn't allowed to publish his test due to company policy, he did so anyway under his pen name Student.

In practice, the t-test allows us to determine whether two data samples come from underlying distributions with the same mean or expected value.

For our purposes, this means that ...