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hw3-67-key

# hw3-67-key - STA 3024 Section 7454 Name UFID Homework 3...

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STA 3024 Homework 3 Section 7454 Form C Name: UFID: This form is only for students whose UFID number begins with 6 or 7. Answer all problems neatly . If you turn in more than one piece of paper, they must be stapled . Work that isn’t neat or stapled may lose points. You don’t need to turn in this problem listing, but you do need to include your name , UF-ID number , and form code on your homework. For all problems where you actually conduct a hypothesis test, be sure to clearly check the assumptions, state the hypotheses, show your work when conducting the test, find a p-value, and make a conclusion in the context of the problem. 33 points total 1. total points: 8 Suppose an experimental eye-drop is being developed to help reduce the appearance of bloodshot eyes. An initial study is done on four volunteers, each of whom is given two bottles of eyedrops (placebo and the experimental drug), and the drops are randomly assigned to an eye. Trained researchers measure the level of ‘bloodshot’ in each eye after one week. Control 12 23 9 12 Drug 5 14 8 14 Conduct a Wilcoxon-Signed Ranks test to see if the drug is more effective than the control. Why is this a better choice than a paired t-test for these data? Best Inference Method 2 points Wilcoxon Signed-Ranks Test Assumptions 2 points Data obtained from randomization Random sample of matched pairs Quantitative response They are all clearly met.

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