Your answer is correct the following table displays

Question 6
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 5 13
1
19
14
19
10
19
8
19

8/17/15, 6:58 PM Print Test
Page 4 of 10
20-40 12 9 14
Under 20 13 18 4
a)
b)
c)
d)
e)
Question 7
Your answer is CORRECT.
Identify the most appropriate test to use for the following situation:
A private and a public university are located in the same city. For the private university, 1046 alumni were
surveyed and 653 said that they attended at least one class reunion. For the public university, 791 out of
1327 sampled alumni claimed they have attended at least one class reunion. Is the difference in the
sample proportions statistically significant?
Question 8
24
37
13
37
13
100
13
30
87
100

8/17/15, 6:58 PM Print Test
Page 5 of 10
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 11.22 ounces and a standard
deviation of 2.14 ounce. What is the probability that the mean contents of the 169 sample cans is less than
10.99 ounces?
Question 9
Your answer is CORRECT.
Find a value of so that
A 97% confidence interval for the mean of a population is to be constructed and must be accurate to
within 0.3 unit. A preliminary sample standard deviation is 1.4. The smallest sample size n that provides
the desired accuracy is
.
a)
b)
c)
d)
e)
Question 10
Your answer is CORRECT.
a)
b)
c P ( Z ≤ c ) = 0.57
0.824
− 0.176
0.176
0.676
1.176
109
103

8/17/15, 6:58 PM Print Test
Page 6 of 10