Data Visualization DSCI 5360

Two identical adjacent rooms each have a light bulb operating at a brightness of 300 lumens. The bulb in one of the rooms is now replaced by a bulb with a higher brightness. What is the minimum brightness (in lumens) needed such that a user will notice the increased brightness as compared to the adjacent room (which is still at 300 lumens).

a.) 310 b.) 305 c.) 303.33 d.) 311.3 b

Which of the following visualizations would be most useful for establishing correlation as described by your book?

a.) A line chart of fuel use over time b.) A bar chart of fuel use by model c.) A scatter plot of engine size to fuel economy d.) A tree map of fuel efficiency by manufacturer c

Which of the following is a resource limitation that should be considered when designing a visualization?

a.) Computational capacity b.) All of the above c.) Display capacity d.) Human perceptual and cognitive capacity b

A ______ encodes a hint at the effect of a given selection.

a.) Item filter b.) Scented widget c.) Attribute filter d.) Latent dimension b

Which of the following is a problem associated with the use of distortion?

a.) Junk associated with visual communication of distortion b.) Target acquisition problems c.) All of the above d.) Unsuitable for spatial judgements c

When evaluating information presented in given visualization, which of the following would likely be associated with the largest error by the observer?

a.) Length b.) Color hue c.) Position d.) Volume b

You know your company maintains a dashboard that displays the performance of sales representatives within the company. The dashboard is updated daily and the order of the sales representatives shifts quite a bit. Someone asks you who the top performer is today. Which type of search task would this be?

a.) Lookup b.) Explore c.) Browse d.) Locate c

A client comes to you and says, "I want to analyze monthly defect count data to see how our production machinery is performing." Another client says, "I need some help visualizing our weekly sales." Both of these tasks could be abstracted to which of the following activity?

a.) Make predictions about the future b.) Visualizing time-series data c.) Comparing values between two groups d.) Understanding spatial orientation b

True or false, if the summary statistics for a given dataset match those of another dataset, the items described in both datasets are essentially the same.

a.) Spatial aggregation b.) Columnar filtering c.) Attribute synthesis d.) Dimensionality reduction d

A dataset consisting of customers and their relationships to one another would likely be what dataset type?

a.) Table b.) Field c.) Geometry d.) Network d

The magical number seven, plus or minus two refers to __________.

a.) The minimum number of idioms that should be considered for a given visualization b.) the optimal number of features in a visualization c.) The ratio of rods to cones in the human eye d.) the number of items that can be held in the average human's working memory d

The term _____ refers to the fact that there are 3 types of cones with sensitivities for different wavelengths of light.

a.) Tricolor-channel fovea b.) trichromacy c.) opponent color channels d.) chromaticity b

What concept is described by the following observation? If we double the length of a line, our brains perceive that change as an actual doubling. However, if we double the area of a circle, we only perceive the new circle as approximately 1.7 times the size of the original, rather than 2 times as expected.

a.) Tufte's Law b.) Few's Law c.) Steven's Law d.) Russell's Law c

In the language of data visualization, an idiom is __________.

a.) a verbal analysis of big data b.) a tool that serves well for one task but is poorly suited for another c.) a distinct approach to creating and manipulating visual representations d.) the amount of information density in a single image Answer: c

Table calculations _____.

a.) allow additional aggregation of data in Tableau b.) are defined based on a scope and direction c.) can be selected from a list of regularly used options d.) All of the above d

An idiom appropriate for visualizing data with 1 key and 1 value is a _____.

a.) bar chart b.) heatmap c.) scatterplot d.) cannot be determined based on this information a

The _____ function in Tableau allows a designer to break up a given column into multiple fields.

a.) break b.) distinct c.) segment d.) split d

The variable ITEM_COUNT in a business dataset would likely be a _____ variable.

a.) categorical b.) quantitative c.) ordinal d.) cyclic b

In a tabular dataset, a _____ represents an item and a _____ represents an attribute.

a.) cell, row b.) column, cell c.) row, column d.) column, row c

Focus + Context techniques, while preserving the surrounding environment (the __________), enable us to interactively explore an area of interest (the __________) in greater detail.

a.) context, focus b.) context, idiom c.) idiom, focus d.) focus, context a

A _____ visualization presents many views by breaking the data up based on the value of a given dimension.

a.) dimensional representation b.) small multiple visualization c.) shared navigation visualization d.) multiform visualization b

Another name for a choropleth map is a _____.

a.) dual axis map b.) filtered circle map c.) filled sequential map d.) simple table c

A(n) _____ strategy is a kind of dynamic filtering in which some items are omitted and others are summarized.

a.) dynamic distortion b.) hyperbolic geometry c.) superimposition d.) elide d

It is possible to represent two different measures using a(n) _____.

a.) filtered circle map b.) filled sequential map c.) dual axis map d.) simple table c

A map in which a color gradient indicates the magnitude of some quantitative variable is called a _____ map.

a.) gradient-fill b.) cloropleth c.) simple d.) chromatic b

A(n) _____ idiom simulates physical forces to layout the elements of a graph.

a.) grouseflocks b.) force-directed placement c.) treemap d.) adjacency matrix b

A __________ is a basic graphical element in an image, while a __________ is a way to control the appearance of those elements.

a.) idiom, channel b.) mark, idiom c.) channel, mark d.) mark, channel d

Determining the correlation between dataset columns is a common prelude to __________.

a.) item aggregation b.) attribute filtering c.) attribute aggregation d.) item filtering c

Line, dot, and bar charts are all examples of _____.

a.) none of the above b.) radial layouts c.) 3 key, 2 value idioms d.) list alignment d

The _____ idiom is a single focus, radial magnification distortion.

a.) nonlinear magnification field b.) hyperbolic geometry c.) fisheye lens d.) stretch and squish c

In Tableau, the _____ shelf allows the designer to create simple animations.

a.) pages b.) rows c.) filters d.) columns a

A _____ is a group of items within a visualization.

a.) parameter b.) target c.) set d.) filter c

A ______ may be dynamically created based on a _____.

a.) parameter, set b.) filter, set c.) set, parameter d.) set, filter c

__________ are rapid eye movements to can a target during fixation.

a.) saccadic movements b.) vergence movements c.) fovea movements d.) parafovea movements a

You have been asked to produce a visualization of the relationships among the employees of a small company. What idiom would likely be best to represent this type of data?

a.) scatterplot b.) adjacency matrix c.) treemap d.) node-link diagram d

The notion of _________ illustrates that our perception of colors is influenced by other nearby colors.

a.) simultaneous luminance b.) bivariate contrast c.) bivariate colormaps d.) simultaneous contrast d

A _____ is useful when attempting to represent progress towards a goal.

a.) table calculation b.) waterfall chart c.) streamgraph d.) bullet chart d

A graph representing hierarchical relationships is often referred to as a(n) _____.

a.) tree b.) network c.) leveled network d.) treemap a

You have been tasked with examining product warranty claims, the number of people writing/calling/emailing complaints and requesting replacements. You have noticed that in general, the number of claims are significantly higher for manufacturing facility A versus manufacturing facility B. This leads you to believe that the products being created by facility A are worse than those from facility B. Then you notice that for one product, left-handed monkey wrenches, the number of defects is much higher at facility B. This last observations would be best characterized as a __________.

a.) trend b.) attribute c.) feature d.) outlier d

A graph is a collection of _____ and _____.

a.) vertices, nodes b.) nodes, edges c.) edges, links d.) none of the above b

_____ is a major disadvantage to the use of multiple views.

a.) view size is reduced b.) too many design choices c.) more difficult comparisons d.) eyes beat memory a

In Tableau, a _____ is a logical progression of visualizations that allow for the communication of a message, while a _____ is a set of visualizations presented on the same screen to facilitate decision making.

a.) viz, chart b.) story, dashboard c.) dashboard, story d.) chart, viz b

Visualization is appropriate when _________.

a.) we seek to analyze large datasets b.) we want to augment human capabilities c.) problems are ill defined d.) All of the above d

True or false, if the summary statistics for a given dataset match those of another dataset, the items described in both datasets are essentially the same.

false

True or false, it is not possible to add a regression-based trendline in Tableau.

false

True or false, it would be appropriate to encode magnitude using the shape channel.

false

True or false, representing data with three keys as a cube is a widely accepted best practice.

false

True or false, superimposed static layers would be appropriate for a line graph with 50 lines.

false

True or false, when using Tableau, custom calculated fields must be created in the data source prior to importing the data into Tableau for visualization.

false

True or false, you should use highly saturated colors for backgrounds.

false

True or false, Google Earth is a good candidate for demonstrating geometric zooming.

true

True or false, Tableau is capable of connecting to a Microsoft Access database.

true

True or false, a set can be defined by selecting objects from a visualization.

true

True or false, adjacency matrices are less useful for understanding network topology than node-link diagrams.

true

True or false, attributes can be aggregated.

true

True or false, in Tableau data for a visualization may be obtained from multiple data sources.

true

True or false, visual communication of distortion requires overhead.

true

True or false, map data can be filtered to a specific region.

ture