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Unformatted text preview: iables with different measurement scales, then the most appropriate
way is to
compare the two samples:
A. Standard deviations
B. Variances
C. Coefficient of variations
D. Ranges
E. Interquartile ranges 24. A disadvantage of using grouping (a frequency table) with sample data is that:
A. Calculations involving central tendency and variation are more complicated than central
tendency and variation calculations based on ungrouped data.
B. The descriptive statistics are less precise than the descriptive statistics obtained using
ungrouped data.
C. The interpretation of the grouped data descriptive statistics is meaningless.
D. It is much more difficult to summarize the information than it is with the ungrouped data. 25. When using the Chebyshev's theorem to obtain the bounds for a 99.73 percent of the
values in a population, the interval generally will be ___________ the interval obtained for
the same percentage if normal distribution is assumed (empirical rule).
A. Shorter than
B. Wider than
C. The same as 26. A quantity that measures the variation of a population or a sample relative to its mean is
called the
A. Range
B. Standard deviation
C. Coefficient of variation
D. Variance
E. Interquartile range 1120 Chapter 01  An Introduction to Business Statistics 27. As a measure of variation, the sample _________ is easy to understand and compute. It is
based on the two extreme values and is therefore a highly unstable measure.
A. Range
B. Standard deviation
C. Variance
D. Interquartile range
E. Coefficient of variation 28. 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 mean?
A. 71.5
B. 72.0
C. 77.0
D. 71.0
E. 73.0 29. 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 median?
A. 71.5
B. 72.0
C. 77.0
D. 71.0
E. 73.0 30. 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 mode?
A. 71.5
B. 72.0
C. 77.0
D. 71.0
E. 73.0 1121 Chapter 01  An Introduction to Business Statistics 31. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are:
68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the mean?
A. 70
B. 75
C. 68
D. 71
E. 80 32. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are:
68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the median?
A. 70
B. 75
C. 68
D. 71
E. 80 33. In a hearing test, subjects estimate the loudness (in decibels) of sound, and the results are:
68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68
What is the mode?
A. 70
B. 75
C. 68
D. 71
E. 80 1122 Chapter 01  An Introduction to Business Statistics 34. 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: $3,250, $1,127, $2,995, $3,250, $3,445, $3,449, $1,482, $6,120,
$3,009, $4,000
What is the mean?
A. 3447
B. 3213
C. 3250
D. 6120
E. 3445 35. 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: $3,250, $1,127, $2,995, $3,250, $3,445, $3,449, $1,482, $6,120,
$3,009, $4,000
What is the median?
A. 3447
B. 3213
C. 3250
D. 6120
E. 3445 36. 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: $3,250, $1,127, $2,995, $3,250, $3,445, $3,449, $1,482, $6,120,
$3,009, $4,000
What is the mode?
A. 3447
B. 3213
C. 3250
D. 6120
E. 3445 1123 Chapter 01  An Introduction to Business Statistics 37. 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): 118, 124, 108, 116, 99, 120, 148, 118, 119, 121,
45, 130, 118
What is mean?
A. 114.15
B. 118
C. 148
D. 45
E. 115.5 38. 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): 118, 124, 108, 116, 99, 120, 148, 118, 119, 121,
45, 130, 118
What is the median?
A. 114.15
B. 118
C. 148
D. 45
E. 115.5 39. 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 sto...
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