Data Visualisation

Question 1

Adjacent value (2)

Answer 1

–On a box plot
–The first value of the data set inside either outer fence

Question 2

What do the X and Y axis represent in a bar chart?

Answer 2

X-axis: usually a categorical variable

Y-axis: frequency, average, %, etc.

Question 3

Box plot (3)

Answer 3

Exploratory data chart that shows:
1. Median
2. Central spread
3. Position of relative extremes

Question 4

Cumulative frequency (2)

Answer 4

–Distribution (table or chart
–Shows # of cases that have occurred up to and including the specified category

Question 5

Exploratory data analysis (2)

Answer 5

–Tukey
–Closely examine data for patterns before significance testing

Question 6

Frequency polygon (2)

Answer 6

–Histogram
–Shows only peaks of class intervals

Question 7

Hinge position (3)

Answer 7

–In box plots
–Top of data set where 1st quartile is
–Bottom of data set where 3rd quartile is

Question 8

Hinge spread (2)

Answer 8

–Box plot
–Distance between lower and upper hinges

Question 9

Histogram (3)

Answer 9

–Chart
–Contains an entire continuous data set
–Divided into proportional class intervals

Question 10

Line chart

Answer 10

Joins continuous data points in a single line

Question 11

Lower hinge

Answer 11

–Box plot
–First quartile

Question 12

Outer fence (4)

Answer 12

–Box plot
–Extreme position
–Lower hinge - 1.5 x the hinge spread
–Upper hinge + 1.5 x the hinge spread

Question 13

Stem and leaf chart (3)

Answer 13

–Exploratory data analysis tool
–Shows every value in a data set
–Organised into class intervals to give a histogram shape

Question 14

Time series

Answer 14

–Line chart
–Shows measures of a variable at different time intervals

Question 15

Upper hinge

Answer 15

–Box plot
–Third quartile

Question 16

What two factors do you have to balance when deciding whether to visualise data?

Answer 16

–Efficiency
–Transparency

Question 17

What can bar charts hide?

Answer 17

Continuous data

Question 18

Where should I look to find style guides for tables and charts?

Answer 18

APA style guides

Question 19

What four factors make up the anatomy of a table?

Answer 19

1. Numbered sequentially, informative title
2. Informative row/column headers
3. Note for more information, like abbreviations
4. No vertical lines

Question 20

What four factors make up the anatomy of a figure?

Answer 20

1. Numbered sequentially with an informative title
2. Mention what features like error bars represent
3. Note for more information, like abbreviations
4. Informative axis labels so readers can understand without reading the main text

Question 21

Give an example of a common visual illusion in data visualisation?

Answer 21

Truncated y-axis

Question 22

What is a truncated y-axis?

Answer 22

–Y-axis that doesn’t start at 0
–Makes people think there’s a bigger difference between values

Question 23

What common visual confusion should I be aware of?

Answer 23

Colour coding that colourblind people can’t see

Question 24

Why should I use visual grouping?

Answer 24

Highlight comparisons I want readers to make

Question 25

Give an example of a common assumption people have about how to interpret different features of graphs.

Answer 25

Lower numbers at bottom of y-axis, higher numbers at top.

Question 26

What do tables help you do?

Answer 26

Efficiently communicate large amounts of data

Question 27

What do figures help you do?

Answer 27

Highlight key patterns & messages