The Null and Alternative
The most common problem I noticed on this assignment was caused by failing to properly identify the appropriate null and alternative hypotheses. In part, this is due to the Evans text’s somewhat confusing explanation of how to do this – the “burden of proof” approach. There is a much simpler approach that always works.

First, make sure you closely read the problem statement looking for key words and phrases. This table may help:


The null hypothesis always Setting up Hypothesis Tests