Data Visualisation

Question 1

Why do we use data visualisation?

Answer 1

• Data visualisation gives us a clear idea of what information means by giving it context through maps, infographics, statistical charts and many more
• Data visualisation makes quantitative (or qualitative) data more natural for the human mind to comprehend through pictorial means
• Data visualisation makes it easier to identify trends, patterns and outliers within large data sets

Question 2

Why is data visualisation important?

Answer 2

• It uses simplified visuals of raw data that’s “crunched” by models to communicate findings that are intuitive & effective
• Visual outputs can serve help academics, stakeholders, policy makers etc., for decision making as well as prediction for outcomes.

Question 3

What are the benefits of data visualisation?

Answer 3

• To support evidence-based research in establishing correlations in relationships
• To demonstrate trends of time which, turn in, is used for making predictions (aka forecast) ahead in time
• To show frequency of events represented in pictorial form, and how data is centred around a value and how its spread out around that value as well as over an interval etc.

Question 4

List the different techniques for data visualisation.

Answer 4

• Infographics
• Heatmap visualisation
• Trend-based visualisation
• Bi, or multi-variable visualisation
• Visualisations representing densities & distributions of numerical data

Question 5

What are histograms used for?

Answer 5

Histogram is the most commonly used graph to show the frequency of observations.

Question 6

What is a ‘bin’?

Answer 6

User specified ranges (aka groups) that these observations (or data points) are counted.

Question 7

What’s the difference between density plots and histograms?

Answer 7

Density plots shows the same thing as a histogram (frequency of observations), however these observations are counted on a continuous interval.

Question 8

What’s the difference in shape between density plots and histograms?

Answer 8

Density plots are smooth curves and histograms are made up of bars.