A pie chart is always preferable to a bar chart, when describing a nominal variable.

Question

Quizplus · Accepted Answer

A pie chart is not always preferable for describing a nominal variable; the choice between a pie chart and a bar chart depends on the specific context and the clarity of the information being presented. Bar charts can be more effective for comparing individual categories, especially when there are many categories or when the differences between categories are small.

A Pie Chart Is Always Preferable to a Bar Chart