2. What is an alpha level? When should it be set?
3. Where did the generally accepted .05 alpha level come from?
4. What is another term for alpha level?
5. How does 1 sided and 2 sided test differ in terms of the critical values for an alpha of .05, .10, or .01.
6. What confidence interval would you use to do a two sided hypothesis at an alpha level of .02?
7. What about a one sided hypothesis test at an alpha level of .02?
8. Describe the two types of errors that we can make when completing a hypothesis test?
9. Suppose a drug company is testing a new formula for a headache medicine. The original formula reports a 80% improvement rate. In a study of the new formula 192 of 220 patients reported an improvement in their headache sypmtoms. Describe in context the "cost" of making each type of error for a hypothesis test in this situation.
10. What is the power of a test?
11. What are two ways you can increase the power of a test?
12. How can we both increase power and decrease alpha?
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