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Unformatted text preview: Practice Midterm Pubh 7401: Fundamentals of Biostatistical Inference This is a CLOSED BOOK exam. You are allowed to use your 1 page 8.5 x 11 in piece of paper with notes. You may also use the class notes from the course website. You are allowed Wolfram Alpha and Microsoft Excel/Stata/SAS, but do not use other websites. Show your work. 1 1) (10 points) A famous probability problem: “My dad heard this story on the radio. At Duke University, two students had received A’s in chemistry all semester. But on the night before the Final exam, they were partying in another state and didn’t get back to Duke until it was over. Their excuse to the professor was that they had a flat tire, and they asked if they could take a makeup test. The professor agreed, wrote out a test and sent the two to separate rooms to take it. The first question (on one side of the paper) was worth 5 points, and they answered it easily. Then they flipped the paper over and found the second question, worth 95 points: ‘Which tire was it?’ What was the probability that both students would say the same thing” 2 2) (25 points) Consider a RV X ∼ Poisson...
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 Spring '11
 RichMacLehose
 Probability theory, Defense Intelligence Agency, Big Falls, proper distribution, famous probability problem

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