Notes
Representation of Categorical variables:
- Frequency distribution tables
- Bar charts
- Pie charts
- Pareto Diagrams
- Photo
- A Pareto Diagram is a special type of bar chart, where categories are shown in descending order of frequency.
- Frequency is the number of occurrences of each item
- A curve is on the same graph, to show the cumulative frequency.
- Cumulative frequency is the sum of the relative frequencies.
- The Pareto Diagram combines the strong sides of the bar and pie charts.
- It shows how subtotals change with each additional category and provide us with a better understanding of our data.
Pareto Principle
- 80% of the effect come from 20% of the causes.
Course Materials
2.3.Categorical-variables.Visualization-techniques-lesson.xlsx