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Q:
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
What is the shape of the distribution of the data?
A. skewed with tail to the right
B. skewed with tail to the left
C. normal
D. bimodal
Q:
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
How many classes should be used in the construction of a histogram?
A. 4
B. 6
C. 10
D. 5
E. 2
Q:
A local electronics retailer 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. They obtained the following results. What percentage of the customers had the highest credit balances and purchased an LCD television?
A. 36.30
B. 5.90
C. 19.60
D. 56.30
E. 16.20
Q:
A local electronics retailer 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. They obtained the following results. What percentage of purchases were plasma televisions by customers with the smallest credit balances?
A. 50.00
B. 39.20
C. 56.30
D. 34.80
E. 19.60
Q:
Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide. The following results were obtained. What percentage of those surveyed could not correctly recall the company?
A. 58.00
B. 56.89
C. 55.00
D. 43.10
E. 42.00
Q:
Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide. The following results were obtained. What percentage of those surveyed were female and could not recall the company?
A. 40.0
B. 22.0
C. 52.4
D. 66.7
E. 37.9
Q:
The following is a relative frequency distribution of grades in an introductory statistics course. If we wish to depict these data using a pie chart, find how many degrees should be assigned to the highest grade of A.
A. 61.1
B. 22.0
C. 79.2
D. 90.0
E. 212.40
Q:
The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students, find the frequency of failures.
A. 12
B. 6
C. 23
D. 46
E. 3
Q:
The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students, find the frequency for the highest two grades.
A. 44
B. 118
C. 59
D. 74
E. 35
Q:
The following is a partial relative frequency distribution of grades in an introductory statistics course. Find the relative frequency for the B grade.
A. .78
B. .27
C. .65
D. .37
E. .47
Q:
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the distances over 24 miles. A. .375
B. .150
C. .125
D. .025
E. .325
Q:
Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance. A. .375
B. .150
C. .500
D. .300
E. .333
Q:
Using the following data, what would be the leaf unit in a stem-and-leaf display? A. 1.0
B. 10
C. .10
D. .01
E. .20
Q:
Using the following data, what would be the range of the values of the stem in a stem-and-leaf display? A. 11-17
B. 11-18
C. 10-18
D. 12-17
E. 12-18
Q:
Using the following data, describe the shape of the data distribution. A. skewed to the left
B. bimodal
C. normal
D. skewed to the right
Q:
822 customers were randomly selected from those who had recently bought a book over the Internet. The chart below shows the breakdown of the classification of the book type. What percentage of the books were in the top two categories?
A. 22.99
B. 20.44
C. 4.50
D. 43.43
E. 0.4343
Q:
822 customers were randomly selected from those who had recently bought a book over the Internet. The chart below shows the breakdown of the classification of the book type. What percentage of the books purchased were self-help books?
A. 11.44
B. .1144
C. 1.82
D. 0.0182
E. 0.940
Q:
822 customers were randomly selected from those who had recently bought a book over the Internet. The chart below shows the breakdown of the classification of the book type. What percentage of the books purchased were either mystery or science fiction/fantasy?
A. 18.61
B. 36.50
C. 17.88
D. 24.33
E. 22.99
Q:
At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?
A. 0.03
B. 0.06
C. 0.08
D. 0.13
E. 0.15
Q:
At the end of their final exam, 550 students answered an additional question in which they rated their instructor's teaching effectiveness, with the following results. 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
Q:
As a general rule, when creating a stem-and-leaf display, there should be ______ stem values.
A. between 3 and 10
B. between 1 and 100
C. no fewer than 20
D. between 5 and 20
Q:
An example of manipulating a graphical display to distort reality is ___________.
A. starting the axes at zero
B. making the bars in a histogram equal widths
C. stretching the axes
D. starting the axes at zero and stretching the axes
Q:
A very simple graph that can be used to summarize a quantitative data set is called a(n) ___________.
A. runs plot
B. ogive plot
C. dot plot
D. pie chart
Q:
A histogram that tails out toward smaller values is ___________.
A. skewed to the left
B. normal
C. a scatter plot
D. skewed to the right
Q:
A histogram that tails out toward larger values is ___________.
A. skewed to the left
B. normal
C. a scatter plot
D. skewed to the right
Q:
The percentage of measurements in a class is called the ___________ of that class.
A. frequency
B. relative frequency
C. leaf
D. cumulative percentage
Q:
A relative frequency curve having a long tail to the right is said to be ___________.
A. skewed to the left
B. normal
C. a scatter plot
D. skewed to the right
Q:
The number of measurements falling within a class interval is called the ___________.
A. frequency
B. relative frequency
C. leaf
D. cumulative sum
Q:
A graphical portrayal of a quantitative data set that divides the data into classes and gives the frequency of each class is a(n) ___________.
A. ogive plot
B. dot plot
C. histogram
D. Pareto chart
E. bar chart
Q:
A flaw possessed by a population or sample unit is ___________.
A. always random
B. a defect
C. displayed by a dot plot
D. the cause for extreme skewness to the right
Q:
The general term for a graphical display of categorical data made up of vertical or horizontal bars is called a(n) ___________.
A. pie chart
B. Pareto chart
C. bar chart
D. ogive plot
Q:
A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What is the midpoint of the third class interval?
A. 22.5
B. 27.5
C. 32.5
D. 37.5
E. 42.5
Q:
A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What is the relative frequency for the largest interval?
A. .132
B. .226
C. .231
D. .283
E. .288
Q:
A company collected the ages from a random sample of its middle managers, with the resulting frequency distribution shown below. What would be the approximate shape of the relative frequency histogram?
A. symmetrical
B. uniform
C. multiple peaks
D. skewed to the left
E. skewed to the right
Q:
A local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below. What would be the class length for creating the frequency histogram?
A. 1.4
B. 0.8
C. 2.7
D. 1.7
E. 2.3
Q:
A local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below. In developing a histogram of these data, how many classes would be used?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
A local airport keeps track of the percentage of flights arriving within 15 minutes of their scheduled arrivals. The stem-and-leaf plot of the data for one year is below. How many flights were used in this plot?
A. 7
B. 9
C. 10
D. 11
E. 12
Q:
A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What would be the first class interval for the frequency histogram?
A. 5.2-6.5
B. 5.2-6.0
C. 5.0-6.0
D. 5.2-6.6
E. 5.2-6.4
Q:
A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What would be the class length used in creating a frequency histogram?
A. 1.4
B. 8.3
C. 1.2
D. 1.7
E. 0.9
Q:
A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. If you were creating a frequency histogram using these data, how many classes would you create?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What is the smallest percentage spent on R&D?
A. 5.9
B. 5.6
C. 5.2
D. 5.02
E. 50.2
Q:
A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. What is the approximate shape of the distribution of the data?
A. normal
B. skewed to the right
C. skewed to the left
D. bimodal
E. uniform
Q:
If there are 30 values in a data set, how many classes should be created for a frequency histogram?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
If there are 62 values in a data set, how many classes should be created for a frequency histogram?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
If there are 120 values in a data set, how many classes should be created for a frequency histogram?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
If there are 130 values in a data set, how many classes should be created for a frequency histogram?
A. 4
B. 5
C. 6
D. 7
E. 8
Q:
All of the following are used to describe qualitative data except the ___________.
A. bar chart
B. pie chart
C. histogram
D. pareto chart
Q:
Which of the following graphical tools is not used to study the shapes of distributions?
A. stem-and-leaf display
B. scatter plot
C. histogram
D. dot plot
Q:
When developing a frequency distribution, the class (group) intervals should be ___________.
A. large
B. small
C. integer
D. mutually exclusive
E. equal
Q:
Which one of the following graphical tools is used with quantitative data?
A. bar chart
B. histogram
C. pie chart
D. Pareto chart
Q:
______________ and _____________ are used to describe qualitative (categorical) data.
A. Stem-and-leaf displays, scatter plots
B. Scatter plots, histograms
C. Box plots, bar charts
D. Bar charts, pie charts
E. Pie charts, histograms
Q:
A ______________ can be used to differentiate the "vital few" causes of quality problems from the "trivial many" causes of quality problems.
A. histogram
B. scatter plot
C. Pareto chart
D. ogive plot
E. stem-and-leaf display
Q:
A ______________ shows the relationship between two variables.
A. stem-and-leaf
B. bar chart
C. histogram
D. scatter plot
E. pie chart
Q:
A _____________ displays the frequency of each group with qualitative data and a _____________ displays the frequency of each group with quantitative data.
A. histogram, stem-and-leaf display
B. bar chart, histogram
C. scatter plot, bar chart
D. stem-and-leaf, pie chart
Q:
When grouping a large sample of measurements into classes, the ______________ is a better tool than the ___________.
A. histogram, stem-and-leaf display
B. box plot, histogram
C. stem-and-leaf display, scatter plot
D. scatter plot, box plot
Q:
A Stem-and-leaf display is best used to ___________.
A. provide a point estimate of the variability of the data set
B. provide a point estimate of the central tendency of the data set
C. display the shape of the distribution
D. None of the other choices is correct.
Q:
A plot of the values of two variables is a _____ plot.
A. runs
B. scatter
C. dot
D. ogive
Q:
Which of the following graphs is for qualitative data?
A. histogram
B. bar chart
C. ogive plot
D. stem-and-leaf
Q:
An observation separated from the rest of the data is a(n) ___________.
A. absolute extreme
B. outlier
C. mode
D. quartile
Q:
All of the following are used to describe quantitative data except the ___________.
A. histogram
B. stem-and-leaf chart
C. dot plot
D. pie chart
Q:
Row or column percentages can be found in
A. frequency tables.
B. relative frequency tables
C. cross-tabulation tables.
D. cumulative frequency tables.
Q:
________ can be used to study the relationship between two variables.
A. Cross-tabulation tables
B. Frequency tables
C. Cumulative frequency distributions
D. Dot plots
Q:
A(n) ______ is a graph of a cumulative distribution.
A. histogram
B. scatter plot
C. ogive plot
D. pie chart
Q:
Which of the following dashboard graphical methods will show variation over time?
A. bullet graph
B. sparkline
C. treemap
D. gauge
Q:
Which of the following is the best analytic dashboard graphical method for visualizing hierarchical information?
A. bullet graph
B. sparkline
C. treemap
D. gauge
Q:
As a business owner, I have requested my staff to develop a set of dashboards that can be used by the public to show wait time at each of my four local coffee shops at peak times during the day and whether the time is short, medium, or long. Which of the following graphical displays would be the best choice?
A. bullet graph
B. sparkline
C. treemap
D. gauges
Q:
A(n) _____________ is a graphical presentation of the current status and historical trends of a business's key performance indicators.
A. frequence distribution
B. histogram
C. Pareto chart
D. dashboard
Q:
Which of the following is not a graphical tool for descriptive analytics (dashboards)?
A. bullet graph
B. sparkline
C. scatter plot
D. treemap
E. gauge
Q:
If space is an issue when presenting analytic dashboard graphics, gauges should be used most frequently.
Q:
An analytic dashboard presents both current and historical trends of a business's key performance indicators.
Q:
Sparklines are line charts often embedded with the text where they are being discussed.
Q:
A treemap graphic is a series of clustered rectangles.
Q:
Key performance indicators are best represented by a data discovery method.
Q:
A bullet graph features a single measure as either a horizontal or vertical bar.
Q:
Sparklines always need to be displayed with either their axes or coordinates.
Q:
Treemaps are used to display qualitative measures of performance.
Q:
Data drill down is a form of data discovery.
Q:
Gauges feature a single measure showing variation over time.
Q:
Leaves on a stem-and-leaf display should be rearranged so that they are in increasing order from left to right.
Q:
Each stem of a stem-and-leaf display should be a single digit.