data visualisation

Question 1

why visualise data?

Answer 1

makes it easier to understand data sets

so can test and look at assumptions

Question 2

what was datasaurus dozen?

Answer 2

Cairo (2016) - produced dataset that created a plot in the shape of a dinosaur

Matejka and Fitzmaurice (2017) - simulated 12 more datasets with identical descriptive statistics

Question 3

what is the purpose of data visualisation?

Answer 3

data analysis process - check assumptions have been met, understand the relationships between variables before inferential analysis

report writing and publication process - show clear relationships between variables, help the reader interpret data in the way you want them to

Question 4

what graphs are used for checking data assumptions?

Answer 4

histogram

box plot

Question 5

what graphs are used for summarising descriptives?

Answer 5

bar chart

clustered bar chart

Question 6

what graphs are used for graphing relationships?

Answer 6

scatterplots

Question 7

what makes a good graph?

Answer 7

images are clear

units of measurements provided

axes clearly labelled

elements in the figure are clearly labelled and described

avoid distorting the data

induce the reader to think about the underlying messages of the figure

avoid chartjunk

Question 8

what is chartjunk?

Answer 8

the use of unnecessary or misleading elements in the design of the graph