Statistics 230, Fall 2010
Midterm Test 1
October 14, 2010
Duration: 75 Minutes
Family Name:
Given Name:
ID #:
Signature:
Section:
Box
001  La Croix (12:301:20)
Box
002  Moshksar (12:301:20)
Box
003  Struthers (10:3011:20)
Box
004  La Croix (1:302:20)
Box
005  Moshksar (1:302:20)
Instructions:
1. Please indicate your section above.
2. You may use a pink tie calculator for this exam, but a calculator is not required.
3. Show your work where possible. Part marks cannot be awarded for work that is not shown.
4. If you experience difficultly with one part of a question, but would like to use its answer in
a subsequent part, use an unknown to represent the answer, and show how you would finish
the problem if you had this extra information.
5. You may tear off the attached piece of scrap paper. It should not be handed in.
1.
[2 marks]
Let
A
and
B
be two events with P(
A
) = 0
.
4 and P(
B
) = 0
.
3. Find P(
A
∪
B
) if
(a)
A
and
B
are mutually exclusive.
(b)
A
and
B
are independent.
2.
[3 marks]
A researcher has heard that 10% of students have cheated on an examination,
and wishes to confirm this result with a confidential study.
The researcher prepares a box
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 Fall '10
 MichaelLa
 Statistics, Probability, Probability theory, La Croix, Question B. Question, Concordia Club

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