data visualisation (graphs)

Question 1

bar chart

Answer 1

• qualitative data
• length of the bar is proportional to the frequency of the data
• gaps

Question 2

word clouds

Answer 2

• qualitative data
• translating it into a suitable font size (bigger = more frequent)
• problem: may think same words are different

Question 3

tree mapping

Answer 3

• qualitative data

- used for representing hierarchal data in a tree like structure

Question 4

histogram

Answer 4

• quantitative data
• main purpose: understand distribution of frequencies
• width of the classes represented by the width of the bar
• frequency = height
• interested in the area of the bar

Question 5

line graph (time series)

Answer 5

• quantitative data

- when data is observed over a period of time (allowing understanding of changes)

Question 6

scatter graph

Answer 6

• quantitative data

- enables visualisation of two variables