Midterm_1_Solution

Midterm_1_Solution - Midterm 1 Spring 2010 Solutions 1. (6...

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Midterm 1 Spring 2010 Solutions 1. (6 marks) Read the following and then fill in the spaces based on what you have read. There is ½ mark for each correct answer. Six weeks before a national election in Canada, a political party commissions a poll to assess what proportion of eligible voters plan to vote and, of those, what proportion support the party. A polling company has a list of eligible voters and their telephone numbers in the 40 largest cities in Canada. They select 3000 names from the list and call them. Of these, 1104 eligible voters agree to participate in the survey with the results summarized in the table below. Support party Plan to Vote YES NO YES 351 381 NO 107 265 A unit is an eligible voter [ a voter is not an acceptable answer] The target population is all eligible voters [note the target population must be a collection of units as defined above] A variate is whether or not an eligible voter plans to vote or whether or not an eligible voter supports the party [a variate is a quantity or characteristic associated with a unit] The study population is all eligible voters on the list [ these are the units that might be included in the sample] The sample is the 1104 eligible voters who respond to the questions or the 3000 eligible voters who were called [ the first answer is better – since the sample is the set of units from the study population on which we get values for the variated] The polling firmed only called eligible voters in urban areas. This could lead to study error
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Midterm_1_Solution - Midterm 1 Spring 2010 Solutions 1. (6...

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