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Chapter 5 Homework
Due: Tue Sep 27
[Over 65 points]
NAME: ____________________________________
501. [Ch. 4, 8 p.] (Definitions)
a. [2 p.] What is the difference between a “discrete” and a “continuous”
variable?
b. [2 p.] What is a probability function?
c. [2 p.] What is the difference between a discrete and a continuous
probability function?
d. [2 p.] What do we mean by the “expected value” of a probability function?
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503. [Chapter 5; 12 p.] (Discrete Empirical probability)
We have an 8
sided die with sides labeled “A” through “H”. After rolling this
die a large number of times, we have constructed the following table of
relative frequencies:
A
0.05
B
0.20
C
0.15
D
0.12
E
0.04
F
0.24
G
0.08
H
0.12
(a)
[2 p.
] What is the probability of rolling a “G”?
(b)
[2 p.
] What is the probability of rolling a “C”?
(c)
[2p.
] What is the probability of rolling any letter other than “A”?
(d)
[3 p.] You roll the die 5 times. What is the probability of rolling the
exact sequence ABCDE ?
(e)
[3 p.] In using the above table of relative frequencies to answer
questions about probability, what key assumption did we have to
make?
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 Spring '09
 Business, Probability, Probability theory

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