86
CHAPTER 4. DISCRETE RANDOM VARIABLES
Solution to Exercise 4.52 (p. 80)
REVIEW QUESTION 9 Solution : 0.2709
Solution to Exercise 4.53 (p. 80)
REVIEW QUESTION 10 Solution : B
Solution to Exercise 4.54 (p. 80)
REVIEW QUESTION 11 Solution
X
= the number of patients calling in claiming to have
the ﬂu
, who actually have
the ﬂu
.
X
= 0, 1, 2, .
..25
Solution to Exercise 4.55 (p. 81)
REVIEW QUESTION 12 Solution :
B
(
25, 0.04
)
Solution to Exercise 4.56 (p. 81)
REVIEW QUESTION 13 Solution : 0.0165
Solution to Exercise 4.57 (p. 81)
REVIEW QUESTION 14 Solution : 1 patient
Solution to Exercise 4.58 (p. 81)
REVIEW QUESTION 15 Solution : C
Solution to Exercise 4.59 (p. 81)
REVIEW QUESTION 16 Solution : All words used by Tom Clancy in his novels
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CHAPTER 5. CONTINUOUS RANDOM VARIABLES
Percentile, k:
k
=
LN(1AreaToTheLeft)

m
5.2 Homework
2
For each probability and percentile problem, DRAW THE PICTURE!
Exercise 5.1
Consider the following experiment. You are one of 100 people enlisted to take part in a study to
determine the percent of nurses in America with an R.N. (registered nurse) degree. You ask nurses
if they have an R.N. degree. The nurses answer “yes” or “no.” You then calculate the percentage
of nurses with an R.N. degree. You give that percentage to your supervisor.
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 Fall '08
 Ripol
 Statistics, Probability, Probability distribution, probability density function, Continuous probability distribution

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