112_midterm_answers_S08

112_midterm_answers_ - 1 Statistics 112 Midterm Examination 1 Professor Esfandiari Spring 2008 There are 6 multiple-choice questions and four

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Statistics 112 Midterm Examination 1 Professor Esfandiari Spring 2008 There are 6 multiple-choice questions and four open-ended questions. In the case of multiple-choice questions, choose one answer only . In the case of open-ended questions be specific, write clearly, and do not repeat yourself. Last Name: ____________________ First Name: _______________________ Student ID: ____________________ Email: ________________________ Questions Possible points Actual points ---------------------------------------------------------------------------------------------------------- 6 Multiple choice Q’s 24 Question 7 8 _______________________________________________________________________ Question 8 7 _______________________________________________________________________ _ Question 9 6 ----------------------------------------------------------------------------------------------------------- Question 10 5 ----------------------------------------------------------------------------------------------------------- Total points 50 ----------------------------------------------------------------------------------------------------------- Percentage ---------------------------------------------------------------------------------------------------------- You can have a cheat sheet written back and front You need to have your ID to take the exam You can have a calculator of any kind You cannot have access to the book, the quizzes, the homework solutions, or the labs 1
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Question 1 (4 points). Given the following data is available on a random sample of 200 people: Number of hours a part time employee works per week Annual income in dollars Type of job Religious background (Christian, Buddist, Jewish) Whether religion approves drinking alcohol (yes/no) What would be the best method for studying the relationship between a) number of hours on the job and annual income and, b) the relationship between religion and approval of drinking alcohol. You cannot transform the variables. You need to use them the way they are. a) Use a scatterplot for case a and a segmented bar chart for case b. b) Use a contingency table for case a and a scatterplot for case b. c) Use a back to back histogram on case a and a back to back bar chart for case b d) Use a segmented bar chart for case a and boxplot for case b Number of hours on the job and annual income are both quantitative variables and thus one needs to draw a scatterplot to show the relationship between them. Religion and approval of drinking alcohol yields frequency data and the best way to examine that relationship would be to do a segmented bar charts with percentages. You can
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This note was uploaded on 06/09/2008 for the course STATS 112 taught by Professor Esfandini during the Spring '08 term at UCLA.

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112_midterm_answers_ - 1 Statistics 112 Midterm Examination 1 Professor Esfandiari Spring 2008 There are 6 multiple-choice questions and four

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