Page 1 of 35
OPRE 6301 TEST 2 EXAM | FREQUENTLY
TESTED QUESTIONS WITH CORRECT
ANSWERS | BRAND NEW!
A major department store chain is interested in estimating the
average amount its credit card customers spent on their first
visit to the chain's new store in the mall. Fifteen credit card
accounts were randomly sampled from the normally distributed
population and analyzed with the following results: = $50.50. The
population variance is 400. A 95% confidence interval for the
average amount the credit card customers spent on their first
visit to the chain's new store in the mall is:
$50.50 ± $9.09.
$50.50 ± $10.12.
$50.50 ± $11.08.
None of these choices - ✔✔✔ Correct Answer > $50.50 ± $10.12.
,Page 2 of 35
A survey of an urban university showed that 750 of 1100 students
sampled attended a home football game during the season. Using
the 99% level of confidence, what is the confidence interval for
the proportion of students attending a football game?
[0.767, 0.814]
[0.6550, 0.7050]
[0.6456, 0.7179]
[0.6795, 0.6805] - ✔✔✔ Correct Answer > [0.6456, 0.7179]
A sample of five Fortune 500 companies showed the following
revenues ($ millions): 7505.0, 2904.7, 7208.4, 6819.0, and 19500.0.
Based on this information, which of the following statements is
correct?
a. An estimate of the average revenue for all Fortune 500
companies is 8787.42 ($ millions).
b. Over half of all Fortune 500 companies earn at least 7208.4 ($
millions) in revenues.
c. The average revenue for all Fortune 500 companies is 8787.42
($ millions).
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d. If five other Fortune 500 companies were chosen, the average
revenue would be 8787.42 ($ millions). - ✔✔✔ Correct Answer > a. An
estimate of the average revenue for all Fortune 500 companies is
8787.42 ($ millions).
The birth weight of newborns, rounded to the nearest gram, is an
example of
a. Nominal
b. Ordinal
c. Discrete variable
d. Continuous variable - ✔✔✔ Correct Answer > c. Discrete variable
The manager of the customer service division of a major
consumer electronics company is interested in determining
whether the customers who have purchased a DSLR Camera
over the past 12 months are satisfied with their products. If there
are 4 different brands of DSLR's made by the company, the best
sampling strategy would be to use a:
a. stratified random sample.
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b. cluster sample.
c. simple random sample.
d. self-selected sample. - ✔✔✔ Correct Answer > a. stratified random
sample.
The personnel director at a large company studied the eating
habits of the company's employees. The director watched and
recorded whether each employee brought his/her own lunch to
work, ate at the company cafeteria, or went out to lunch. What
method of data collection was used here?
a. An experiment.
b. Direct observation.
c. A personal interview.
d. A survey. - ✔✔✔ Correct Answer > b. Direct observation.
OPRE 6301 TEST 2 EXAM | FREQUENTLY
TESTED QUESTIONS WITH CORRECT
ANSWERS | BRAND NEW!
A major department store chain is interested in estimating the
average amount its credit card customers spent on their first
visit to the chain's new store in the mall. Fifteen credit card
accounts were randomly sampled from the normally distributed
population and analyzed with the following results: = $50.50. The
population variance is 400. A 95% confidence interval for the
average amount the credit card customers spent on their first
visit to the chain's new store in the mall is:
$50.50 ± $9.09.
$50.50 ± $10.12.
$50.50 ± $11.08.
None of these choices - ✔✔✔ Correct Answer > $50.50 ± $10.12.
,Page 2 of 35
A survey of an urban university showed that 750 of 1100 students
sampled attended a home football game during the season. Using
the 99% level of confidence, what is the confidence interval for
the proportion of students attending a football game?
[0.767, 0.814]
[0.6550, 0.7050]
[0.6456, 0.7179]
[0.6795, 0.6805] - ✔✔✔ Correct Answer > [0.6456, 0.7179]
A sample of five Fortune 500 companies showed the following
revenues ($ millions): 7505.0, 2904.7, 7208.4, 6819.0, and 19500.0.
Based on this information, which of the following statements is
correct?
a. An estimate of the average revenue for all Fortune 500
companies is 8787.42 ($ millions).
b. Over half of all Fortune 500 companies earn at least 7208.4 ($
millions) in revenues.
c. The average revenue for all Fortune 500 companies is 8787.42
($ millions).
,Page 3 of 35
d. If five other Fortune 500 companies were chosen, the average
revenue would be 8787.42 ($ millions). - ✔✔✔ Correct Answer > a. An
estimate of the average revenue for all Fortune 500 companies is
8787.42 ($ millions).
The birth weight of newborns, rounded to the nearest gram, is an
example of
a. Nominal
b. Ordinal
c. Discrete variable
d. Continuous variable - ✔✔✔ Correct Answer > c. Discrete variable
The manager of the customer service division of a major
consumer electronics company is interested in determining
whether the customers who have purchased a DSLR Camera
over the past 12 months are satisfied with their products. If there
are 4 different brands of DSLR's made by the company, the best
sampling strategy would be to use a:
a. stratified random sample.
, Page 4 of 35
b. cluster sample.
c. simple random sample.
d. self-selected sample. - ✔✔✔ Correct Answer > a. stratified random
sample.
The personnel director at a large company studied the eating
habits of the company's employees. The director watched and
recorded whether each employee brought his/her own lunch to
work, ate at the company cafeteria, or went out to lunch. What
method of data collection was used here?
a. An experiment.
b. Direct observation.
c. A personal interview.
d. A survey. - ✔✔✔ Correct Answer > b. Direct observation.
