Finding a p-value from the t distribution

The details of a hypothesis test for a mean, μ, are described when the value of σ is unknown.

Saturated fat content of cooking oil

A t-test is used to assess a clinician's claim about the saturated fat content of soybean cooking oils.

Two-tailed test

When the alternative hypothesis is simply that μ is not equal to some constant, the tail area of the t distribution must be doubled to get a p-value for the test.