# Answers_to_prelim2_sample_questions_09 - PAM 2100 Spring...

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Unformatted text preview: PAM 2100 Spring 2009 INSTRUCTOR: SALAM ABDUS SAMPLE PRELIM QUESTIONS (PRELIM #2) In total there will be 8 problems and 15 multiple choice questions. 8 problems would be worth 70 points and the 15 multiple choice questions would be worth 30 points. The problems will be similar to the problems which you have solved in problem sets #4 and #5. The problems that we have solved during the lectures (which are on the lecture notes) are also important examples of what might show up on the prelim. In what follows I have provided sample questions for the problems. However, you should also review the problems in the problem sets and the problems which we solved in class. We have solved some multiple choice questions from chapter 3 in class. Those questions are the best examples of what might show up in the prelim as multiple choice questions from chapter 3. Here, I have also provided samples of multiple choice questions from chapter 4 and section 1 of chapter 5. Problems from the textbook 4.24 (a) The given probabilities have sum 0.41, so P( English ) = 0 . 59. (b) P( not English ) = 1 − 0 . 59 = 0 . 41. (Or, add the other three probabilities.) 4.35 If we assume that each site is independent of the others (and that they can be considered as a random sample from the collection of sites referenced in scientific journals), then P( all seven are still good ) = 7 ) 13 . 1 (- = 0 . 3773. 4.43 (a) Nancy and David’s children can have alleles BB, BO, or OO, so they can have blood type B or O. (b) Either note that the four combinations in the table are equally likely or compute P( type O ) = P( O from Nancy and O from David ) = 0 . 5*0.5 = 0 . 25 and P( type B ) = 1 − P( type O ) = 0 . 75....
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