This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 77
D. 516.20
E. 144.00 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 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 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 1130 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 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 65. 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 standard deviation?
A. 1359
B. 4993
C. 1846575
D. 3587
E. 1976454 1131 Chapter 01  An Introduction to Business Statistics 66. The local amusement park was interested in the average wait time at their most popular
roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line
between 2 and 3 p.m. Each was given a stop watch to record the time they spent in line. The
times recorded were as follows (in minutes) (mean = 114.15): 118, 124, 108, 116, 99, 120,
148, 118, 119, 121, 45, 130, 118
What is the range?
A. 103
B. 23.62
C. 557.97
D. 128.8
E. 115 67. The local amusement park was interested in the average wait time at their most popular
roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line
between 2 and 3 p.m. Each was given a stop watch to record the time they spent in line. The
times recorded were as follows (in minutes) (mean = 114.15): 118, 124, 108, 116, 99, 120,
148, 118, 119, 121, 45, 130, 118
What is the variance?
A. 103
B. 23.62
C. 557.97
D. 128.8
E. 115 68. The local amusement park was interested in the average wait time at their most popular
roller coaster at the peak park time (2 p.m.). They selected 13 patrons and had them get in line
between 2 and 3 p.m. Each was given a stop watch to record the time they spent in line. The
times recorded were as follows (in minutes) (mean = 114.15): 118, 124, 108, 116, 99, 120,
148, 118, 119, 121, 45, 130, 118
What is the standard deviation?
A. 103
B. 23.62
C. 557.97
D. 128.8
E. 115 1132 Chapter 01  An Introduction to Business Statistics 69. Quality control is an important issue at ACME Company which manufactures light bulbs.
In order to conduct testing of the life hours of their light bulbs, they randomly sampled nine
light bulbs and measured how many hours they lasted (mean = 346.6). 378, 361, 350, 375,
200, 391, 375, 368, 321
What is the range?
A. 342.43
B. 3424.3
C. 58.5
D. 191
E. 10609 70. Quality control is an important issue at ACME Company which manufactures light bulbs.
In order to conduct testing of the life hours of their light bulbs, they randomly sampled nine
light bulbs and measured how many hours they lasted (mean = 346.6). 378, 361, 350, 375,
200, 391, 375, 368, 321
What is the variance?
A. 342.43
B. 3424.3
C. 58.5
D. 191
E. 10609 71. Quality control is an important issue at ACME Company which manufactures light bulbs.
In order to conduct testing of the life hours of their light bulbs, they randomly sampled nine
light bulbs and measured how many hours they lasted (mean = 346.6). 378, 361, 350, 375,
200, 391, 375, 368, 321
What is the standard deviation?
A. 342.43
B. 3424.3
C. 58.5
D. 191
E. 10609 1133 Chapter 01  An Introduction to Business Statistics 72. In a statistic class, 10 scores were randomly selected with the following results were
obtained: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the 90th percentile?
A. 77
B. 73
C. 74
D. 67
E. 65.9 73. In a statistic class, 10 scores were randomly selected with the following results were
obtained: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the third quartile?
A. 65.9
B. 67.3
C. 66.75
D. 73.85
E. 77.0 74. In a statistic class, 10 scores were randomly selected with the following results were
obtained: 74, 73, 77, 77, 71, 68, 65, 77, 67, 66
What is the first quartile?
A. 65....
View
Full
Document
This document was uploaded on 01/20/2014.
 Winter '14

Click to edit the document details