Advanced Measurements in Statistics — Stem-and-leaf data representation

About this lesson

This unit teaches students how to represent and compare data using stem-and-leaf plots. It begins with single stem-and-leaf representations for integer data, explaining how to identify stems and leaves, arrange leaves in ascending order, and create a key. Examples include basketball scores and student marks, with tasks to find the largest value, count values above a threshold, and calculate the median. The unit then extends to decimal data, such as cycling race times and chick weights, where the stem represents the integer part and leaves the decimal part. Finally, it introduces double stem-and-leaf plots for comparing two related datasets, like maximum and minimum temperatures, and discusses dispersion by comparing ranges. Exercises reinforce skills in constructing plots, reading original data from plots, and choosing correct answers based on plots.