Year 8 - Maths
Calculating the median
Numerical summaries of data
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils explore the concept of measures of central tendancy, developing understanding of different types of average and their relative benefits and drawbacks. We then investigate other summaries of data such as the range and data comparison techniques.
Lesson Summary
You will learn to calculate the median from data presented in a frequency table and different graphs.
Key Notes
- The median can be calculated from a line graph.
- The median can be calculated from an ungrouped frequency table.
- The median can be calculated from a bar chart.
Vocabulary To Learn
- Data: Data are a collection of information
Common Mistakes To Avoid
- Pupils may choose the middle bar on the bar chart or the middle value on the x-axis as their median.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
The median can be calculated from a line graph. The median can be calculated from an ungrouped frequency table.
2. Use this key word in a maths sentence and explain it clearly. 'Data'
Data are a collection of information. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may choose the middle bar on the bar chart or the middle value on the x-axis as their median. Correction: Pull off the data from the bar chart or line graph to show where the median value is.
More Lessons In This Unit
- Analysing different statistical representations Study Guide
- Calculating the mean Study Guide
- Calculating the mode Study Guide
- Changing a data point Study Guide
- Checking understanding of the mean Study Guide
- Comparing statistical representations Study Guide
- Comparing summaries of data Study Guide
- Correlation Study Guide
- Evaluating the range Study Guide
- Problem solving with numerical summaries of data Study Guide
- Statistical problems - data collection Study Guide
- Statistical problems - data presentations Study Guide
- Statistical problems - drawing conclusions Study Guide
- Statistical problems - statistical summaries Study Guide
- Summarising data Study Guide
- Understanding and calculating the range Study Guide
- Understanding the median Study Guide
- Understanding the mode Study Guide
Browse all guides in the Year 8 Maths guide library.