Exam 1 Answers

Exam 1 Answers - STA 103 Exam 1 Spring 2008 I. H. Dinwoodie...

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STA 103 Exam 1 Spring 2008 I. H. Dinwoodie NAME Calculator allowed, closed book.
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1 Circle True or False. (1 point each) 1. A researcher looked at admission data at University of Michigan in 1970 to investigate the relationship between gender and admission rate. The researcher noted the number of applicants and the number of admissions for men and women separately, also separating the numbers by College (College of Science and College of Arts). (a) T This study is an “observational study.” (b) F If the overall admission rate for men in the aggregated data over both colleges turns out to be higher than for women, then it must be higher in at least one of the colleges as well. (c) F This study is a “randomized experiment” with random assignment to gender. (d) F If the particular college in which a student applied is not of primary concern in the researcher’s investigation of gender and admission rates, then that information may be removed from the data without loss. (e) T The relationship between admission rate and gender may be con- fused by omitting the college variable. (f) T College of application is called a “confounding” variable. (g)
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This note was uploaded on 09/29/2008 for the course STAT 103 taught by Professor Dinwoodie during the Spring '08 term at Duke.

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Exam 1 Answers - STA 103 Exam 1 Spring 2008 I. H. Dinwoodie...

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