Lecture 2.3 - Describing Categorical Data - Best practices while graphing data - 1

Question 1

Know your purpose

Answer 1

1. Select appropriate table/graph for the purpose.
2. Pie charts compare parts of a whole.
3. Bar graphs compare things between different groups.

Question 2

Label your data

Answer 2

1. Label chart, indicate combined or omitted categories.
2. Name bars in a bar chart.
3. Name slices in a pie chart.
4. If cases are omitted, ensure label clarifies the summarized collection.

Question 3

Many Categories

Answer 3

1. Avoid excessive categories in bar or pie charts to prevent important ones from being concealed.
2. Consider grouping other categories when necessary.