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317 exam Spring 2008 Form A

317 exam Spring 2008 Form A - Econ 317 Form A Exam 1 Name 1...

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Econ 317 Form A Exam 1 Name___________________ 1. A study based on 116 stage 3 colon cancer patients in the U.S. shows that 71 of them responded favorably to a new treatment that requires 2 sessions of radiation therapy per month. a. Describe the population, sample, and the variable of interest. b. Give an example of a descriptive statement and an inferential statement that could be made based on this information. 2. The probabilities that an American adult male has high blood pressure and/or high cholesterol is shown in the following table. (You need to show your work) Blood Pressure High OK High .13 .27 Cholesterol OK .18 .42 a. What is the probability that a man has both conditions? b. What is the probability that he has high blood pressure? c. What is the probability that a man with high blood pressure has high cholesterol? d. What is the probability that he has neither high cholesterol nor high blood pressure? 3. A company’s records indicate that on any given day about 2% of their day shift employees and 4% of the night shift employees will miss work. If 70% of the employees work the day shift what percent of employees are absent on any given day?
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