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STAB22 Past Midterm solutions 01
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University of Toronto ScarboroughSTAB22 Midterm Examination
November 2007
For this examination, you are allowed one handwritten
letter-sized sheet of notes (both sides) prepared by you,
a non-programmable, non-communicating calculator,
and writing implements.
This examination has 11 numbered pages; before you
start, check to see that you have all the pages.
This examination is multiple choice. Each question has
equal weight. On the Scantron answer sheet, ensure that
you enter your last name, first name (as much of it as
fits), student number (in “Identification”) and tutorial
number (in “Grade or Educ”). For your reference, a list-
ing of tutorials is below.
1 Tue 14:00 6 Wed 13:00 13 Thu 14:00
2 Tue 16:00 7 Wed 15:00 9 Thu 15:00
3 Tue 17:00 11 Wed 16:00 10 Thu 16:00
4 Tue 18:00 8 Thu 12:00 14 Fri 11:00
5 Wed 12:00 12 Thu 13:00 15 Fri 12:00
1
, 1. A description of different houses on the market includes the following three variables.
Which of these variables is/are quantitative?
(a) The square footage of the house
(b) The monthly gas bill
(c) The monthly electric bill
(d) * All of the above
2. A histogram of the heights of 85 plants is shown below. The histogram will be used
for this question and the following two questions.
Approximately what percent of the plants in this sample are taller than 20 cm?
(a) 55%
(b) * 47%
(c) 37%
(d) 30%
(e) 15%
3. Again looking at the histogram in Question 2, which of the following will provide a
better summary of the heights of these 85 plants?
(a) * The five number summary
(b) The mean and the standard deviation
4. Some Minitab output is given below. It gives the stemplot and some summary statistics
of IQ scores of a group of students. Use the information shown to answer this question
and the three questions following.
2
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