Year 10 - Maths
Checking understanding composite and bar-line charts
Comparisons of 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 will compare two different data sets and compare different measures of central tendancy when interpreting the data. Pupils will learn to interrogate frequency tables and stem and leaf diagrams both with and without technology.
Lesson Summary
You will learn to construct/interpret composite bar charts and bar-line charts.
Key Notes
- Certain data is suitable for a composite bar chart or bar-line chart.
- The shape of the graph can be estimated from the data.
- For larger data sets, technology can make constructing graphs quicker.
Vocabulary To Learn
- Bar chart: A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups.
Common Mistakes To Avoid
- Pupils may read the frequency or % proportion value off of the y-axis for each group on a composite bar chart.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Certain data is suitable for a composite bar chart or bar-line chart. The shape of the graph can be estimated from the data.
2. Use this key word in a maths sentence and explain it clearly. 'Bar chart'
A bar chart (bar graph) is a graph consisting of bars visually representing the frequency of objects or groups. 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 read the frequency or % proportion value off of the y-axis for each group on a composite bar chart. Correction: Remind pupils that another name for composite bar charts is a stacked bar chart and the frequency needs to be calculated.
More Lessons In This Unit
- Calculating summary statistics from a grouped frequency table Study Guide
- Calculating summary statistics from stem and leaf diagrams Study Guide
- Calculating the mean from a grouped frequency table Study Guide
- Checking understanding of bar charts and pictograms Study Guide
- Checking understanding of measures of central tendency Study Guide
- Checking understanding of pie charts Study Guide
- Checking understanding of summary statistics from a frequency table Study Guide
- Checking understanding of summary statistics from a list Study Guide
- Comparing data sets in context Study Guide
- Comparing various representations of data sets Study Guide
- Constructing stem and leaf diagrams Study Guide
- Problem solving with comparisons of numerical data Study Guide
- Statistical summaries using technology Study Guide
- Weighted means Study Guide
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