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Unformatted text preview: ics 87. The local electronics retailer has recently conducted a study on purchasers of large screen
televisions. The study recorded the type of television and the credit account balance of the
customer at the time of purchase. The following results were obtained: Construct a table of row percentages. AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Crosstabulation 1111 Chapter 01  An Introduction to Business Statistics 88. The local electronics retailer has recently conducted a study on purchasers of large screen
televisions. The study recorded the type of television and the credit account balance of the
customer at the time of purchase. The following results were obtained: Construct a table of column percentages. AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Crosstabulation 1112 Chapter 01  An Introduction to Business Statistics 89. Math test anxiety can be found throughout the general population. A study of 116 seniors
at a local high school was conducted. The following table was produced from the data.
Complete the missing parts. AACSB: Analytical Studies
Bloom's: Application
Difficulty: Hard
Topic: Crosstabulation 1113 Chapter 01  An Introduction to Business Statistics 90. The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below:
24, 56, 43, 35, 37, 27, 29, 44, 34, 28, 33, 28, 46, 31, 38, 41, 48, 38, 27, 29, 37, 33, 31, 40, 50
Construct a histogram AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Histogram 1114 Chapter 01  An Introduction to Business Statistics 91. The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below:
24, 56, 43, 35, 37, 27, 29, 44, 34, 28, 33, 28, 46, 31, 38, 41, 48, 38, 27, 29, 37, 33, 31, 40, 50
Construct a stemandleaf plot. AACSB: Analytical Studies
Bloom's: Application
Difficulty: Medium
Topic: Stem And Leaf Chapter 03
Descriptive Statistics: Numerical Methods
True / False Questions 1. The median is the measure of central tendency that divides a population or sample into four
equal parts.
True False 2. The population mean is the average of the population measurements.
True False 3. The mode is the measurement in a sample or population that occurs most frequently.
True False 1115 Chapter 01  An Introduction to Business Statistics 4. The population mean is the point estimate of the sample mean.
True False 5. The median is said to be resistant to extreme values.
True False 6. The range of the measurement is the largest measurement plus the small measurement.
True False 7. The population variance is the average of the squared deviations of the individual
population measurements from the population mean.
True False 1116 Chapter 01  An Introduction to Business Statistics 8. In a symmetric population, the median equals the mode.
True False 9. It is appropriate to use the Empirical Rule to describe a population that is extremely
skewed.
True False 10. The median is the value below which and above which approximately 50 percent of the
measurements lie.
True False 11. An independent variable is a predictor variable that can be used to describe, predict, or
control a dependent variable.
True False 12. If there are 7 classes in a frequency distribution then the fourth class will always contain
the median.
True False 13. Range is a better measure of variation than standard deviation.
True False 1117 Chapter 01  An Introduction to Business Statistics
Multiple Choice Questions 14. A normal population has 99.73 percent of the population measurements within _____
standard deviations of the mean.
A. One
B. Two
C. Three
D. Four 15. A numeric characteristic of a sample is a
A. Mean
B. Variance
C. Statistic
D. Parameter 16. All of the following are measures of central tendency except the
A. Range
B. Mode
C. Mean
D. Median 17. Which percentile describes the first quartile, Q1?
A. 25th
B. 50th
C. 75th
D. 100th 18. Which percentile describes the third quartile, Q3?
A. 25th
B. 50th
C. 75th
D. 100th 1118 Chapter 01  An Introduction to Business Statistics 19. In a given data set the 25th percentile is _______________ equal the lower hinge.
A. Always
B. Sometimes
C. Never 20. Which of the following is influenced the least by the occurrence of extreme values in a
sample?
A. Mean
B. Median
C. Mode
D. Geometric mean
E. Weighted mean 21. If a population distribution is skewed to the right, then, given a random sample from that
population, one would expect that the
A. median would be greater than the mean.
B. mode would be equal to the mean.
C. median would be less than the mean.
D. median would be equal to the mean. 22. If the mean, median, and mode for a given population all equal 25, then we Know that its
distribution is
A. Bimodal
B. Skewed to the right
C. Symmetric
D. Skewed to the left 1119 Chapter 01  An Introduction to Business Statistics 23. If one intends to compare the relative variation between two samples involving two
different quantitative var...
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 Winter '14

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