Statistics and Probability · Hypothesis testing

t-tests

Comparing one or two sample means against a hypothesized value, when the true variance is unknown.

Also known as: one-sample t-test, two-sample t-test, paired t-test.

Start a lesson on t-tests

Learn first

• Hypothesis testing basics: Checking whether observed data is surprising enough to reject a specific default assumption, the null hypothesis.

Leads to

• ANOVA: Comparing the means of three or more groups at once without inflating the false-positive rate.

Related topics

• ANOVA: Comparing the means of three or more groups at once without inflating the false-positive rate.