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STAB22 Past Final 01
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University of Toronto ScarboroughSTAB22 Final Examination
December 2007
This examination is multiple choice. Ensure that you
have a Scantron answer sheet and a #2 pencil, and com-
plete the Scantron sheet according to the instructions
(otherwise your exam may not be marked).
For this examination, you are allowed two letter-sized
sheet of notes (both sides), handwritten and prepared
by you, a non-programmable, non-communicating
calculator, and writing implements.
Each correct answer is worth 1 mark, and each incorrect
answer (and each question for which no answer is given)
is worth 0 marks. There is therefore no penalty for
guessing on this exam.
If your answer is not included in the alternatives given,
mark the answer that is most nearly correct from those
alternatives.
If you need paper for rough work, use the back of the
sheets of this question paper. The question paper will be
collected at the end of the examination, but any writing
on it will not be read or marked.
This examination has 23 numbered pages; before you
start, check to see that you have all the pages. In ad-
dition, tables of the normal, t and binomial distributions
are attached on unnumbered pages at the end.
1
,1. One part of the stock market is called the “over-the-counter market”. One way of
measuring activity in a stock market is by the percentage of outstanding shares traded.
On a particular day, the results for 40 shares were as shown in the stemplot below:
Stem-and-leaf of C1 N = 40
Leaf Unit = 1.0
(22) 0 2222222222333333333333
18 0 444444455555
6 0 66777
1 0
1 1
1 1
1 1
1 1
1 1
1 2
1 2 2
What is the median of this distribution?
(a) 0.3
(b) 2.2
(c) 3
(d) 6
(e) 30
2. In the data of Question 1, how do the mean and median compare?
(a) It is impossible to compare the mean and median from this information.
(b) The mean and median are about the same
(c) The median is bigger than the mean
(d) The mean is bigger than the median
3. The pie chart below displays the distribution of grades in a Statistics course. Note that
in this course, the performance of the students is graded into one of the five grades, A,
B, C, D and F.
2
, One (and only one) of the five bar charts below was constructed from the same data
set used to create the above pie chart. Which of the following bar charts represents
the same data as the pie chart above?
(a) This bar chart:
(b) This bar chart:
3
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