Data Visualization Design Quiz 2: 16 August 2026 (May 2026 term)

1. A

   I have answered this question in the offline paper

2. B

   I have skipped this question

3. C

   This question does not apply to me

1. A

   I have answered this question in the offline paper

2. B

   I have skipped this question

3. C

   This question does not apply to me

1. A

   Position along a common scale

2. B

   Position on identical but non-aligned scales

3. C

   Length

4. D

   Slope

1. A

   They have moved from position along a common scale to length, a demotion of exactly one rank, since each spoke is read as a length outward from the centre

2. B

   They have moved from length to angle, since a radar chart encodes each attribute's value as the angle of its spoke

3. C

   They have moved from position along a common scale to position on non- aligned scales, with the enclosed polygon area coming to dominate what readers actually judge

4. D

   The encoding is unchanged — both charts represent each value as a length, so the difference between them is purely aesthetic

1. A

   She has used the mean where the median was appropriate

2. B

   The sample is too small to support a product decision

3. C

   Her sample excludes everyone who already cancelled, so it cannot reveal what drove people away

4. D

   Feature usage is ordinal and should not be correlated with renewal

1. A

   The views differ because different underlying data were used

2. B

   The fiscal-year view is the more accurate of the two because fiscal years are the legal reporting period

3. C

   The calendar-year view supports that claim and the fiscal-year view does not, even though the data are identical — the choice of aggregation boundary changes the apparent trend

4. D

   Aggregation can change how smooth a line looks but cannot change an apparent trend

1. A

   Mean

2. B

   Medium

3. C

   Mode

4. D

   Standard deviation

1. A

   Panel A uses a bar chart, where a line chart would have been the conventional choice for this kind of engineering data

2. B

   Panel A omits the undamaged flights and does not place temperature on an axis, so the relationship Revathi's team was asserting had no way to become visible

3. C

   Panel A fails to state the team's recommended temperature limit clearly enough

4. D

   Panel A contains too many flights for a review board to absorb in a single sitting

Select all that apply.

1. A

   The question of where the data came from is answered by the sourcing line, and the answer is a party with a direct commercial interest in the result

2. B

   The question of whether the data have been peer-reviewed is answered, and a presentation at the vendor's own user conference does not constitute peer review

3. C

   The question of how the data were collected is answered, and voluntary feedback forms mean the respondents selected themselves

4. D

   The question of whether the data are taken out of context cannot be settled from the sourcing line, since we are not told what else was measured or how many comparisons were run before 12% was reported

5. E

   None of the four questions can be answered here, because the sample size is not stated

6. F

   All four concerns fall away if the 12% difference is shown to be statistically significant

Select all that apply.

1. A

   Because operators frequently monitor the display peripherally from across the room, encoding alerts with motion would remain effective where hue and shape discrimination fall away

2. B

   If the utility expands from 35 stations to 120, alert detection time will stay roughly flat in Grid 1 but rise roughly in proportion to station count in Grid 2

3. C

   The alerts are found pre-attentively in Grid 1 because the orange marker is unique along the hue channel, and that uniqueness is what Grid 2 destroys

4. D

   Providing a clear legend for the category colours would restore the rapid detection of maintenance alerts in case of Grid 2.

5. E

   Making the alert orange more saturated than every category colour is sufficient to restore popout, since saturation outranks hue in the channel ranking

6. F

   Grid 2 can satisfy both requirements by encoding station categories with shape while reserving colour (hue) exclusively for maintenance alerts.

Select all that apply.

1. A

   At least half of all rap and hip hop musicians who have ever lived are still alive, so the observed deaths are a small and unrepresentative slice

2. B

   The distortion is more severe the younger the genre

3. C

   Dying violently or unusually may itself contribute to fame, which affects who enters the sample at all

4. D

   The figures are expressed as rates per 100,000 musicians, so the comparison across genres is adjusted

Select all that apply.

1. A

   Closure — the mind continues visual, auditory and kinetic patterns

2. B

   Continuity — the mind perceives a set of individual elements as a single, recognisable pattern

3. C

   Common fate — elements that share a direction of movement are perceived as belonging together

4. D

   Invariance — the mind recognises simple objects independent of rotation, translation, scale, deformation and lighting

Select all that apply.

1. A

   Both time and distance are encoded as position along a common scale

2. B

   The slope of each line encodes speed

3. C

   The law of continuity lets a reader trace a single train across the chart

4. D

   The chart primarily relies on area to communicate differences between trains.

Select all that apply.

1. A

   Contrast sensitivity is higher in the chrominance channel than the luminance channel

2. B

   Surface colour is constructed largely from edge-contrast information

3. C

   The visual system sees differences rather than absolute values, and is drawn to edges

4. D

   Contrast with the background should be maximised when the outlines of shapes matter

5. E

   The visual system can misread information based on perceived visual properties

Select all that apply.

1. A

   At each boundary the visual system's activity is increased on the lighter side and decreased on the darker side, so a uniform fill appears to shade as it nears its neighbours.

2. B

   Layout B works because the separator removes the shared edge, leaving no boundary for the effect to form at.

3. C

   The reports mean the fills are not truly uniform, and re-exporting at higher colour depth would fix it.

4. D

   Raising the class count from seven to fifteen would remove the artefact, since smaller steps create no edge.

Select all that apply.

1. A

   Recruiting respondents through the customer newsletter introduces selection bias

2. B

   Asking respondents to recall illness over three years introduces recall bias

3. C

   Surveying only customers who are still subscribed after two years introduces publication bias

4. D

   The company having funded its own evidence page introduces recall bias

5. E

   Summarising only the eight written-up trials introduces publication bias

6. F

   The difference in exercise, smoking and check-up habits introduces healthy user bias

Select all that apply.

1. A

   Printing the week the monsoon broke directly onto the outbreak curve, instead of noting it in the caption block below

2. B

   Replacing the fourteen district series with a single state-wide weekly total, so that officers have less to read

3. C

   Showing all fourteen districts as small multiples on one screen against a shared axis, so profiles can be compared across the state at a glance

4. D

   Replacing the 3D bars with flat bars and removing the tinted panel background, since neither carries a value that would be lost by erasing it

5. E

   Encoding weekly cases as the width of a rectangle and weekly growth rate as its height, so both variables travel in a single mark

6. F

   Deleting the axis tick labels and district names, since removing ink always raises the data-ink ratio