Histograms
Draw and interpret histograms with unequal class widths using frequency density
What you'll learn
- 1
Imagine you have a bag of 50 sweets in different colours. A histogram groups continuous data into bars that touch.
- 2
Why do histogram bars touch each other?
- 3
Drag the bars to build a histogram showing the heights of 20 plants: 0-10 cm (5 plants), 10-20 cm (8 plants), 20-30 cm (7 plants).
- 4
Let's find the frequency density for a histogram bar: class width = 10, frequency = 30.
- 5
A class has width 5 and frequency 20. What is the frequency density? Drag the slider to match.
- 6
A histogram bar has frequency 40 and class width 8. What is the frequency density?
- 7
If the frequency density is 7 and the class width is 4, what is the frequency?
Practise Histograms with Whizlo
Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 14–16. Aligned to the UK National Curriculum.