Discussion:
Q1: Researchers routinely choose a-level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower a-level (e.g. 0.01)? What are some situations in which you might accept a higher level (e.g. 0.1)? Why?
Q2: Suppose you hear an "old-timer" say, "Why, in my day, kids were much more respectful and didn't cause as much trouble as they do nowadays!" Formulate a hypothesis related to this statement that you could test. How would you test it?