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Unformatted text preview: of the course was "poor". What proportion of students who think that their textbook
was "hard" also thought their course was "poor".
A. 0.588
B. 0.155
C. 0.091
D. 0.251
E. 0.616 1150 Chapter 01  An Introduction to Business Statistics 117. 550 students answered a question with the following results based on their rating of their
instructor: What proportion of the students who rated their instructor as very or somewhat effective
received a B or better in the class?
A. 0.345
B. 0.254
C. 0.482
D. 0.898
E. 0.644 118. A measurement located outside the outer fences of a boxandwhisker display is _____.
A. always in the first quartile
B. an outlier
C. always the largest value in the data set
D. within the inner fence 119. Another name for the 50th percentile is the _____.
A. Mean
B. First quartile
C. Median
D. Mode
E. Third quartile 1151 Chapter 01  An Introduction to Business Statistics 120. The measurement in a sample or a population that occurs most frequently is the _____.
A. Mode
B. Mean
C. Median
D. Outlier
E. Average 121. The average of the squared deviations of the individual population measurement from
the population mean is the _____.
A. Standard deviation
B. Mean
C. Variance
D. Median
E. Range 122. A(n) _____ process is able to consistently produce outputs that meet specifications.
A. in control
B. capable
C. normal
D. statistically average
E. constant 123. The difference between the largest and smallest measurements in a population or sample
is the _____.
A. Mean
B. Median
C. Range
D. Variance
E. Standard deviation 1152 Chapter 01  An Introduction to Business Statistics 124. If the mean is greater than the median, then the distribution is _____.
A. skewed right
B. skewed left
C. symmetrical
D. bimodel 125. The point estimate of the _______________ is the positive square root of the sample
variance.
A. sample mean
B. sample standard deviation
C. range
D. median
E. population standard deviation 126. Getting a process into statistical control does not guarantee that the process is capable of
_____.
A. Remaining in control
B. Having no outliers
C. Meeting specifications
D. A & C
E. none of the above 127. The ____________________ is a quantity that measures the variation of a population or
sample relative to its mean.
A. Mean
B. Standard deviation
C. Range
D. Coefficient of variation
E. Zscore 1153 Chapter 01  An Introduction to Business Statistics 128. Compute the population variance of the data:
16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.
A. 21.9
B. 3.87
C. 20.5
D. 17.0
E. 3.625 129. If the median of a data set is 760 and the upper quartile is 950, and the lower quartile is
650, what is the interquartile range?
A. 300
B. 190
C. 110
D. 150
E. 910 130. Given a set of data with a mean of 150 and a standard deviation of 20. Using
Chebyshev's Theorem, what is the minimum percentage of data between 110 and 190?
A. 95.44%
B. 93.75%
C. 68.26%
D. 75.00%
E. 98.75% 131. Compute the sample standard deviation of the data set 6,4,2,1,4,1
A. 1.83
B. 2.00
C. 1.41
D. 3.33
E. 4.00 1154 Chapter 01  An Introduction to Business Statistics 132. If 50 of 500 sampled customers said they would make a purchase of a new TV set, what
is the sample proportion?
A. .10
B. .20
C. .15
D. .25 133. Which of these are important properties of any data set?
A. outliers
B. variation
C. shape
D. B & C
E. none of the above 134. If specifications are (1.6, 1.8), and a 99.73 percent tolerance interval is (1.62, 1.83), is
the process capable?
A. Yes, always
B. Yes, 99.73% of the time
C. No 135. The average lateness for one of the top airline companies is 10 minutes. The variance of
the lateness measure is calculated as 9. An airplane arrived 13 minutes after the stated arrival
time. Calculate the Zscore for this particular airplane's lateness.
A. 0.33
B. 0.58
C. 1.33
D. 0.44
E. 1.00 1155 Chapter 01  An Introduction to Business Statistics 136. The average life of Canadian women is 73.75 years and the standard deviation of the
women's life expectancy in Canada is 6.5 years.
Using the Chebyshev's theorem, determine the minimum percentage of women in Canada
whose life expectancy is between 64 and 83.5 years.
A. 93.17%
B. 68.26%
C. 55.56%
D. 88.89%
E. 33.33% 137. The average life of Canadian women is 73.75 years and the standard deviation of the
women's life expectancy in Canada is 6.5 years.
Based on Chebyshev's inequality determine the upper and lower bounds on the average life
expectancy of the Canadian women such that at least 90% of all population is included.
A. [12.09 135.41]
B. [8.75 138.75]
C. [53.20 94.30]
D. [66.38 81.13]
E. [67.25 80.25 138. The following table shows the PricetoEarnings ratio for a Stereo equipment
manufacturing company between 1998 and 2002. Determine the percentage change in the P/E ratios from 1998 to 1999.
A. 15.07%
B. 17.74%
C. 20.72%
D. 17.74%
E. 15.07% 1156 Chapter 01  An Introduction to Business Statistics 139. The following table shows the PricetoEarn...
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 Winter '14

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