Midterm 2009

# Midterm 2009 - Student Name Student Number Row number in...

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Unformatted text preview: Student Name: Student Number: Row number in class during test: Seat number in class during test: Faculty of Science MIDTERM EXAMINATION Mathematics 203 Principles of Statistics I February 11th, 2009 Answer directly on the test (use front and back if necessary). Calculators are allowed. One 8.5” × 11” sheet of notes is allowed. Language dictionaries are allowed. There are 9 pages to this exam and the total number of marks for the exam is 100. There is a bonus question at the end that is worth up to 5 extra points for a correct answer. It does not hurt your score to skip the bonus question. 1 Question 1: (20 points) You have been asked to settle a dispute between two politicians in a particular political party, Party A, regarding the results of the last election. The current party leader, Mr. Cherry, ar- gues that support for the party is growing based on the overall resutls. The younger, upstart challenger, Mr. Melrose, argues that support for the party is weakening based on the results by region. Here are the results of the last two elections split by region (there are only two parties that could be selected in the two elections): East Region Party 2007 election votes 2008 Election Votes A 80 65 B 320 285 West Region Party 2007 election votes 2008 Election Votes A 50 70 B 50 80 (a) Show that Mr. Cherry’s argument is correct, that the overall level of support for the party increased from 2007 to 2008. (b) Show that Mr. Melrose’s argument is also correct, that the support in each region actually declined from 2007 to 2008. 2 (c) Explain to the two politicians what is happening and give your own interpretation of whether support for the party is increasing or decreasing....
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## This note was uploaded on 06/23/2010 for the course MATH 267815 taught by Professor Wolfson,d during the Spring '10 term at McGill.

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Midterm 2009 - Student Name Student Number Row number in...

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