A pie chart uses relative frequencies to summarize the data so including the sample size is not important.

Question

Quizplus · Accepted Answer

While a pie chart does use relative frequencies, it can still be misleading without knowing the sample size. For example, a slice of the pie may appear larger than others, but in reality, it may represent a smaller sample size. Including the sample size can provide a more accurate interpretation of the data.

A Pie Chart Uses Relative Frequencies to Summarize the Data