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.