Unformatted text preview: a day on the job. Suppose the standard deviation is 26.8
minutes and the time spent is approximately a normal distribution.
What are the times that approximately 95.44% of all workers will fall?
A. [387.5 438.5]
B. [386.2 439.8]
C. [372.8 453.2]
D. [359.4 466.6]
E. [332.6 493.4] AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Empirical Rule 1183 Chapter 01  An Introduction to Business Statistics 51. According to a survey of the top 10 employers in a major city in the Midwest, a worker
spends an average of 413 minutes a day on the job. Suppose the standard deviation is 26.8
minutes and the time spent is approximately a normal distribution.
What are the times that approximately 99.73% of all workers will fall?
A. [305.8 520.2]
B. [386.2 439.8]
C. [372.8 453.2]
D. [359.4 466.6]
E. [332.6 493.4] AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Empirical Rule 52. According to Chebyshev's Theorem, at least what proportion of the data will be within
for: k = 2
A. 68%
B. 50%
C. 25%
D. 75%
E. 34% AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Chebyshev's Theorem 53. According to Chebyshev's Theorem, at least what proportion of the data will be within
for: k = 2.5
A. 16%
B. 40%
C. 68%
D. 60%
E. 84% AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Chebyshev's Theorem 1184 Chapter 01  An Introduction to Business Statistics 54. According to Chebyshev's Theorem, at least what proportion of the data will be within
for: k = 1.6
A. 39%
B. 58%
C. 68%
D. 61%
E. 92% AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Chebyshev's Theorem 55. According to Chebyshev's Theorem, at least what proportion of the data will be within
for: k = 3.2
A. 90%
B. 95%
C. 84%
D. 97%
E. 10% AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Chebyshev's Theorem 56. According to Chebyshev's theorem, how many standard deviations from the range would
include at least 80% of the values?
A. 5.0
B. 2.2
C. 2.5
D. 1.6
E. 2.0 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Hard
Topic: Chebyshev's Theorem 1185 Chapter 01  An Introduction to Business Statistics 57. In a statistic class, 10 scores were randomly selected with the following results were
obtained (mean = 71.5): 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the range?
A. 22.72
B. 12.00
C. 4.77
D. 516.20
E. 144.00 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Variability 58. In a statistic class, 10 scores were randomly selected with the following results were
obtained (mean = 71.5): 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the variance?
A. 22.72
B. 12.00
C. 4.77
D. 516.20
E. 144.00 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Variability 59. In a statistic class, 10 scores were randomly selected with the following results were
obtained (mean = 71.5): 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the standard deviation?
A. 22.72
B. 12.00
C. 4.77
D. 516.20
E. 144.00 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Variability 1186 Chapter 01  An Introduction to Business Statistics 60. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are
(mean = 70): 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the range?
A. 18
B. 4.73
C. 22.40
D. 324
E. 6.76 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Variability 61. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are
(mean = 70): 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the variance?
A. 18
B. 4.73
C. 22.40
D. 324
E. 6.76 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Variability 62. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are
(mean = 70): 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the standard deviation?
A. 18
B. 4.73
C. 22.40
D. 324
E. 6.76 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Variability 1187 Chapter 01  An Introduction to Business Statistics 63. The company financial officer was interested in the average cost of PCs that had been
purchased in the past six months. A random sample of the price of 10 computers was taken
with the following results (mean = $3,213): $3,250, $1,127, $2,995, $3,250, $3,445, $3,449,
$1,482, $6,120, $3,009, $4,000
What is the range?
A. 1359
B. 4993
C. 1846575
D. 3587
E. 1976454 AACSB: Analytical Studies
Bloom's: Application
Difficulty: Easy
Topic: Variability 64. The company financial officer was interested in the average cost of PCs that had been
purchased in the past six months. A random sample of the price of 10 computers was taken
with the following results (mean = $3,213): $3,250, $1,127, $2,995, $3,250, $3,445, $3,449,
$1,482, $6,120, $3,009, $4,000
What is the variance?
A. 1359
B. 4993
C. 1846575
D. 3587
E. 1976454 AACSB: Analytical Studies
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 Winter '14

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