Stat 225  Fall 2011 Exam 1
Your Name: _______________________________________________________
Your Section:
Juan (7:30)
Mike C. (8:30)
Mike C. (9:30)
YenNing (10:30)
YenNing (11:30)
Chris (12:30)
Chris (1:30)
Jeremy (2:30)
Jeremy (3:30)
Mike L. (4:30)
Instructions:
Show your work on
ALL
questions. Unsupported work will
NOT
receive full credit.
Decimal answers should be exact, or to exactly 4 decimal places. (Examples: if it is .25
use .25, if it is say .57891234 then use .5789.)
You are responsible for upholding the Honor Code of Purdue University. This includes
protecting your work from other students.
Please write
legibly
. If a grader cannot read your writing,
NO
credit will be given.
You are allowed the following aids: a onepage 8.5" x 11" handwritten (in your
handwriting) cheat sheet, a scientific calculator, and pencils or pens.
Instructors will not interpret questions for you. If you do have questions, wait until
you have looked over the whole exam so that you can ask all of your questions at one
time.
You must show your student ID (upon request), turn in your cheat sheet and sign the
class roster when you turn in your exam to your instructor.
Turn off your cell phone before the exam begins.
Question
Points Possible
Points Earned
1
12
2
9
3
11
4
8
5
15
6
13
7
15
8
16
Cheat Sheet
1
Total
100
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1.
Choose the phrase from the following list that fits most accurately in the sentences
below. Each phrase could be used once, more than once, or not at all. Your answer
MUST
be the letter that represents your chosen phrase.
(12 points total, 2 points each)
(A) disjoint
(B) union
(C) partition
(D) Bayes' Theorem
(E) intersection
(F) General Multiplication Rule
(G) mutually exclusive
(H) permutation
(I) InclusionExclusion formula
(J) independent
(K) combination
(L) Law of Total Probability
_____
a) If A and B are (a) _____, then
(
)
( )
( ).
P A
B
P A
P B
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 Spring '08
 MARTIN
 Conditional Probability, Probability theory, frank

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