A researcher decides to see how effective a pain medication is. Eight randomly selected subjects were asked to determine the severity of their pain by using a scale of 1 to 10, with 1 being very minor and 10 being very severe. Then each was given the medication, and after 1 hour, they were asked to rate the severity of their pain, using the same scale.

1. What is the purpose of the study?
2. Are the samples independent or dependent?
3. What are the hypotheses?
4. What nonparametric test could be used to test the claim?
5. What significance level would you use?
6. What is your decision?
7. What parametric test could you use?
8. Would the results be the same?

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Subject 1 2 3 4 5 6 7 8 Before 8 6 2 3 4 6 2 7 After 6 5 3 1 2 6 1 6