Identify the most appropriate test to use for the following situation:
Quart cartons of milk should contain at least 32 ounces. A sample of 22 cartons was taken and amount of
milk in ounces was recorded. We would like to determine if there is sufficient evidence exist to conclude
the mean amount of milk in cartons is less than 32 ounces?
a)
Two sample
z
test for means
b)
One sample
t
test for means
c)
Two sample
t
test for means
d)
Two sample
z
test for proportions
e)
One sample
z
test for means
f)
One sample
z
test for proportions
g)
Matched pairs
t
test for means
Question 7
Your answer is CORRECT.
A random sample of 169 cans of fruit nectar is drawn from among all cans produced in a run. Prior
experience has shown that the distribution of the contents has a mean of 14.11 ounces and a standard
P
(
A
) = 0.32,
P
(
B
) = 0.48, and
P
(
A
∩
B
) = 0.17
P
(
B

A
)
7/27/16, 12
:
37 PM
Print Test
Page 4 of 9
deviation of 2.18 ounce. What is the probability that the average contents of the 169 sample cans is less
than 13.74 ounces?
a)
0.973
b)
0.014
c)
0.034
d)
0.027
e)
0.986
Question 8
Your answer is CORRECT.
A random variable
X
has a probability distribution as follows:
X
0
1
2
3
4
P(
X
)
3
k
2
k
5
k
3
k
4
k
What is P(X < 2)?
a)
b)
c)
d)
e)
Cannot be determined.
Question 9
Your answer is CORRECT.
Find a value of
so that
.
a)
1
17
13
17
5
17
10
17
c
P
(
Z
≤
c
) = 0.77
0.962
7/27/16, 12
:
37 PM
Print Test
Page 5 of 9
b)
c)
d)
e)
Question 10
Your answer is CORRECT.
The following table displays the results of a sample of 100 in which the subjects indicated their favorite
ice cream of three listed. The data are organized by favorite ice cream and age group. What is the
probability that a person chosen at random will be under 20 years old if he or she favors chocolate?
Age
Chocolate
Vanilla
Strawberry
Over 40
12
8
10
2040
15
8
12
Under 20
11
16
8
a)
b)
c)
d)
e)
Question 11
Your answer is CORRECT.
A random sample of 100 observations produced a sample proportion of 0.25. An approximate 95%
confidence interval for the population proportion
p
is between
a)
0.165 and 0.335
0.417
−
1.080
0.739
−
1.153
11
38
89
100
11
100
11
30
27
38
7/27/16, 12
:
37 PM
Print Test
Page 6 of 9
b)
0.165 and 0.321
c)
0.179 and 0.321
d)
0.207 and 0.293
e)
0.152 and 0.348
Question 12
Your answer is CORRECT.
You've reached the end of your free preview.
Want to read all 9 pages?
 Fall '08
 Staff
 Math, Statistics, Normal Distribution, Standard Deviation