This preview shows pages 1–3. Sign up to view the full content.
STA 301 – Applied Statistics
Spring 2008, Section B
Homework #3 
Key
Due Monday, February 11
Question 1
(p. 39, #2.10)
An engineering firm is hired to determine if certain waterways in Virginia are safe for
fishing.
Samples are taken from three rivers.
(a)
List the elements of the sample space,
S
, using the letters
F
for “safe to fish” and
N
for “not safe to fish.”
S =
{
FFF, FFN, FNF, NFF, FNN, NFN, NNF, NNN
}
(b)
List the elements of
S
corresponding to event
E
that at least two of the rivers are
safe for fishing.
E =
{
FFF, FFN, FNF, NFF
}
(c)
Define (in words) an event that has as its elements the points {
FFF, NFF, FFN,
NFN
}.
“The second river is safe for fishing.”
Question 2
(p. 39, #2.16)
If
{ }
,
12
0

<
<
=
x
x
S
{ }
,
9
1

<
<
=
x
x
M
and
{ }
,
5
0

<
<
=
x
x
N
find
(a)
N
M
U
(b)
N
M
I
(c)
'
'
N
M
I
)
9
,
0
(
)
5
,
0
(
)
9
,
1
(
=
=
U
U
N
M
)
5
,
1
(
)
5
,
0
(
)
9
,
1
(
=
=
I
I
N
M
( 29
)
12
,
9
[
=
′
=
′
′
N
M
N
M
U
I
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document STA 301B, Spring 2008
Homework 3 Key
Page 2 of 4
Question 3
:
(p. 47, #2.28)
A drug for the relief of asthma can be purchased from 5 different manufacturers in liquid,
This is the end of the preview. Sign up
to
access the rest of the document.
This homework help was uploaded on 04/17/2008 for the course STA 301 taught by Professor Noe during the Spring '08 term at Miami University.
 Spring '08
 Noe
 Statistics

Click to edit the document details