MA33-02 Maths Coming soon
Reading and calculating from histograms
MA33-02
This lesson is coming soon.
In this lesson
Read a histogram and calculate the frequency, or an estimated number of items, in a class by multiplying frequency density by class width.
What it covers
- Reading the frequency density value (bar height) for a given class directly from a histogram
- Calculating frequency = frequency density x class width for one or more classes, including unequal widths
- Estimating the total number of items across several classes by summing recovered frequencies
- Estimating a count for a sub-range that assumes values are spread evenly within a bar
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Edexcel IGCSE 4MA1, Eduqas GCSE C300, OCR GCSE J560, Cambridge IGCSE 0580
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | S3 | Construct and interpret diagrams for grouped discrete data and continuous data, ie histograms with equal and unequal class intervals and cumulative frequency graphs, and know their appropriate use |
| Edexcel GCSE 1MA1 | S3 | Construct and interpret diagrams for grouped discrete data and continuous data, i.e. histograms with equal and unequal class intervals and cumulative frequency graphs, and know their appropriate use |
| Edexcel IGCSE 4MA1 | H6.1A | Construct and interpret histograms |
| Eduqas GCSE C300 | HS4 | Construct and interpret diagrams for grouped discrete data and continuous data, i.e. histograms with equal and unequal class intervals and cumulative frequency graphs, and know their appropriate use |
| OCR GCSE J560 | 12.02b | Interpret and construct diagrams for grouped data as appropriate, i.e. cumulative frequency graphs and histograms (with either equal or unequal class intervals). |
| Cambridge IGCSE 0580 | E9.7 | Draw and interpret histograms. |
For teachers
This GCSE Maths lesson teaches reading and calculating from histograms. By the end, students should be able to read a histogram and calculate the frequency, or an estimated number of items, in a class by multiplying frequency density by class width. It works through two worked examples and the mistakes examiners report.