Charts will make readers spend a lot of time pondering or wondering what the author really wants to express, or whether the conclusions claimed by the author are supported by evidence. Therefore, the expression of the chart is very important. Different types of data need to be presented in different appropriate ways. It should be noted that no matter which way you choose to express the data, you need to be consistent with the theme and conclusion of the paper at all times.
Quantitative data are represented by numbers and analyzed by common statistical methods. In contrast, qualitative data consists of case studies or historical documents, and can also be collected through surveys and interviews. Qualitative data are expressed in words and need to be classified and interpreted to produce meaningful results.