Define critical value
1st value of the test statistic in the critical region
Define critical region
set of values of the test statistic for which you reject H0
Define significance level
is the probability of incorrectly rejecting H0
If the test statistic is in the critical region…
You have sufficient evidence to reject H0
If the test statistic is not in the critical region…
You have insufficient evidence to reject H0
Two methods to use when dealing with 2 tailed tests