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recex11 - ORIE 3300/5300 Prof Bland Recitation Exercise...

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ORIE 3300/5300 Fall 2011 Prof. Bland Recitation Exercise 11/Problem Set 11 – Showtime Prob Set 11 due: 10:00 a.m. on 12/2/11 – submit a single zip file digitally as the As- signment ProbSet11 from the Recitation Exercise 10 folder on the course Blackboard site. Work with your regular partner (or alone), preferably with your partner. At the end of your recitation section have your TA check your work. This exercise is a large-scale variation on the prior exercises concerning assigning students to tutorials based on preferences. You will be working with a full data set from the fall 2009 Freshman Writing Seminars. There are 183 courses, each with an enrollment cap of 17, and 2886 students, each of whom has expressed her/his top five choices on a ballot. Your AMPL model, data and script files from the earlier exercises will provide almost all of your AMPL needs for attacking this large-scale problem. (Make sure to check the Prob Set 10 solutions.) There will be only 2 significant vari- ations to cope with the large amount of data. If we were to follow the example of the earlier data files from the tutorial exercises, our data file here would include a 183 × 2886 preference array. That is a big ar- ray. Instead of including it explicitly we will work from the 2886 ballots. The file Fall2009Ballots.xlsx in the Recitation Exercise 10 folder has a table named ballots with six columns and 2887 lines, a header line followed by one line for each student. The line for student j gives that student’s number (1 j 2886) followed by the numbers (between 1 and 183) of students j ’s first through fifth choices. You will need
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