UCSS Math I 4.1.2 Example 2: Comparing Two Data Sets Using Dot Plots

This example demonstrates how to use dot plots to visually compare the distributions of two data sets, serving as an introductory activity in statistics and data analysis. The core mathematical concepts include measures of central tendency (median), spread (minimum and maximum values), and comparative analysis of two groups. Construction highlights: The GeoGebra commands DotPlot, Median, Min, and Max are used to generate dot plots and compute key statistics for each data set. Additional commands such as Sequence, Join, Translate, Segment, and Polygon are employed to create auxiliary segments and shapes that emphasize the median positions and data ranges. Key objects include data lists SansonList and KweiList, their corresponding plot objects SansonPlot and KweiPlot, and labeled points A1–A14 and B1–B14 for annotation. This resource is suitable for high school or pre-university students learning statistical graphing and data comparison, and can also be used by teachers for classroom demonstrations.