Lower critical value Z0.05 -1.645 Upper critical value Z0.95 1.645 Decision Rule The decision rule for this test is, Reject the H0 if Z < -1.645 or Z > 1.645 ` Do business seniors at your school prepare for class more than, less than, or about the same as business seniors at other schools? The National Survey of Student Engagement (N (NSSE) found that business seniors spent a mean of 14 hours per week preparing for class. (Source: A fresh look at student Engagement Annual Results 2013, available at