Author note — to cover

Construct ordered stem-and-leaf diagrams with a key, and read individual values, counts above a threshold, mode, median and range straight from the leaves. Discrete or continuous data with exact values kept. Two-sample versions are the sibling back-to-back page; the averages themselves are taught on Averages and spread. Both tiers. (S4)

Introduction

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Practice and continue

Practice

Stem-and-leaf diagrams

Splitting each value into stem and leaf under a key, with the leaves ordered.

Next lesson

Back-to-back stem-and-leaf diagrams

Two data sets sharing one set of stems, with left-hand leaves read outwards.