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IEE 380 Summer 2009
Name:__________________________
Quiz #5A
a.
Find
a
such that P(
a
< Z < .11) = .410295
Φ
(.11) –
Φ
(a) = .410295

Φ
(a)
= .410295 
Φ
(.11) = .410295.543795
Φ
(a)
= .133500, so a = 1.11
b.
X is the number of calls coming into a Verizon help center per hour.
X is known to be
distributed Poisson with mean equal to 4. What is the probability that no calls come into the
center in a 30minute time period?
Leave your answer in term form but show all numerical
values.
For a 1hour period, c = 4.
For a 30minute period, c = 2
Find P(X = 0)
!
0
2
)
0
(
....
!
)
(
2
0


=
=
e
p
x
e
c
x
p
c
x
IEE 380 Summer 2009
Name:__________________________
Quiz #5B
a.
The number of components, Y, that fail in an hour is known to be distributed Poisson with
mean equal to 6. What is the probability that exactly one component fails in the next 30
minutes?
Leave your answer in term form but show all numerical values.
For a 1hour period, c = 6.
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This note was uploaded on 12/11/2009 for the course CSE IEE taught by Professor Chattin during the Summer '09 term at ASU.
 Summer '09
 chattin

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