February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Frequentist Methods 1: 5
Statistical Issues
The type I error associated with a test design is found by integrating the sampling density under the null hypothesis.
Type 1 error (size of test) is the probability of observing a test statistic (estimate of treatment effect) more extreme than the critical value when the null hypothesis is true.