PG STAT 531 Lecture 3 Graphical and Diagrammatic Representation of Data

The document discusses various methods of graphically and diagrammatically representing statistical data, including: 1) Bar diagrams, pie charts, and line graphs that use bars, circles, or lines to show relationships between data points; 2) Histograms that use rectangles to show frequency distributions; and 3) Frequency polygons and curves that smooth data points to reveal trends, and ogives that show cumulative frequencies. Graphical representations make trends and relationships easier for experts and non-experts to understand versus numerical representations alone.