Grouped Frequency Distribution Tables (GFDTs): Visualizing & Summarizing Quantitative Data

This brief video introduces some basic methods to visualize and summarize quantitative data. In particular, the focus is on constructing and interpreting grouped frequency distribution tables (GFDTs). After the need for GFDTs in place of FDTs is demonstrated, this video shows how a GFDT is constructed. This is followed by an examination of some of the key vocabulary terms, such as class boundaries, class limits, class midpoints, and class with. We end with a discussion of the concept of the discrete unit and the key difference between continuous and discrete data.