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STAB22 Past Midterm solutions 02
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University of Toronto ScarboroughSTAB22 Midterm Examination solutions
June 2007
This examination contains a mixture of short-answer and multiple choice questions. For
the short-answer questions, write your answers in the spaces provided; for the multiple-choice
questions, circle the best answer out of the alternatives given.
Marks for each question are as shown.
Correct answers for multiple-choice questions are shown by a *.
1
, 1. (5 marks) At a certain university in 1993, a record was kept of the number of women
graduating with doctoral degrees in each of six different fields of study.
(a) What is this kind of graph usually called?
i. Histogram
ii. * Bar chart (the variable “field of study” is categorical)
iii. Stem-and-leaf plot
iv. Pie chart
(b) Which field of study had the most women graduating with doctoral degrees in
1993?
Psychology
(c) Approximately how many women graduated with doctoral degrees in life sciences
in 1993?
40 (or 39 if that’s what you think it is)
2. (8 marks) A political scientist takes a large sample of registered voters, and measures a
number of variables, as shown below. Are each of the variables listed below categorical
or quantitative?
(a) Gender
i. * Categorical
ii. Quantitative
(b) Age
i. Categorical
ii. * Quantitative
(c) Household income
i. Categorical
2
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