Author note — to cover (Higher)

Higher only. Recover frequencies from a drawn histogram via area: whole classes, part-classes such as values above a point inside a bar, and grand totals. Include the trap that the tallest bar need not hold the most data, and estimating counts in a given range. Completing a partly drawn histogram is the sibling page. (S3)

Introduction

—coming soon—

Practice and continue

Practice

Interpreting a histogram

Frequencies from bar areas, and why the tallest bar need not hold the most data.

Next lesson

Completing a histogram and its table

Using one known bar to fix the density scale, then finishing the table and bars.