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Unformatted text preview: ifference was 16.061. What
do you conclude at α = .01?
A. No evidence of a difference
B. Significant difference in the scores AACSB: Reflective Thinking
Bloom's: Synthesis
Difficulty: Medium
Learning Objective: 4
Topic: Paired differences 128. A coffee shop franchise owner is looking at two possible locations for a new shop. To
help make a decision he looks at the number of pedestrians that go by each of the two
locations in onehour segments. At location A, counts are taken for 35 onehour units and
with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the
second location (B), counts are taken for 50 one hour units with a mean number of pedestrians
of 347 and a sample standard deviation of 85. Assume the two populations variances are not
known but are equal. Calculate the pooled estimate of
.
A. 10362.42
B. 101.80
C. 22.40
D. 503.32 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 2
Topic: Two independent population means 1924 Chapter 01  An Introduction to Business Statistics 129. A coffee shop franchise owner is looking at two possible locations for a new shop. To
help make a decision he looks at the number of pedestrians that go by each of the two
locations in onehour segments. At location A, counts are taken for 35 onehour units and
with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the
second location (B), counts are taken for 50 one hour units with a mean number of pedestrians
of 347 and a sample standard deviation of 85. Assume the two populations variances are not
known but are equal. Calculate a 95% confidence interval for the difference in pedestrian
traffic at the two locations. (pooled estimate of
= 22.4)
A. (37.15 110.85)
B. (14.6 59.4)
C. (51.6 96.4)
D. (30.1 117.9)
[74 ± (1.96) 22.4)] = [74 ± 43.9] = [30.1, 117.9] AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Two independent population means 130. A coffee shop franchise owner is looking at two possible locations for a new shop. To
help make a decision he looks at the number of pedestrians that go by each of the two
locations in onehour segments. At location A, counts are taken for 35 onehour units and
with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the
second location (B), counts are taken for 50 one hour units with a mean number of pedestrians
of 347 and a sample standard deviation of 85. Assume the two populations variances are not
known but are equal. Setup the null hypothesis to test the claim that both sites have the same
number of pedestrians.
A. µa  µb = 0
B. µa  µb ≠ 0
C. µa  µb > 0
D. µa  µb < 0 AACSB: Reflective Thinking
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Two independent population means 1925 Chapter 01  An Introduction to Business Statistics 131. A coffee shop franchise owner is looking at two possible locations for a new shop. To
help make a decision he looks at the number of pedestrians that go by each of the two
locations in onehour segments. At location A, counts are taken for 35 onehour units and
with a mean number of pedestrians of 421 and a sample standard deviation of 122. At the
second location (B), counts are taken for 50 one hour units with a mean number of pedestrians
of 347 and a sample standard deviation of 85. Assume the two populations variances are not
known but are equal. (pooled variance = 22.4) Testing the claim that both sites have the same
mean number of pedestrians at
= .01, what do you conclude?
A. There is a difference between the two sites
B. There is no difference between the two sites AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Two independent population means 132. In a market research study conducted by a local winery on white wine preference, the
following results were found. Of a sample of 500 men, 120 preferred white wine and of a
sample of 500 women, 210 preferred white wine. Setup the alternative hypothesis that will
test the claim that the percentage of women preferring white wine is 25% higher than men.
A. Pw  Pm ≠ .25
B. Pw  Pm > .25
C. Pw  Pm < .25
D. Pw  Pm ≠ 0 AACSB: Reflective Thinking
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 1926 Chapter 01  An Introduction to Business Statistics 133. In a market research study conducted by a local winery on white wine preference, the
following results were found. Of a sample of 500 men, 120 preferred white wine and of a
sample of 500 women, 210 preferred white wine. Calculate the test statistic for testing the
claim that women are 25% higher than men on preference for white wine.
A. 6.167
B. 82.16
C. 2.397
D. .07 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 5
Topic: Two independent population proportions 134. In a market research study conducted by a local winery on white wine preference, the
following results wer...
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 Winter '14

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