Step 7 Objective
Construct, on paper and using ICT:
- pie charts for categorical data;
- bar charts and frequency diagrams for discrete and continuous data;
- simple line graphs for time series;
- simple scatter graphs.
Identify which are most useful in the context of the problem.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
When drawing a pie chart, what information do you need to calculate the size of the angle for each category?
What is discrete data? What is continuous data? Give me some examples.
How do you go about choosing class intervals when grouping data for a bar chart or a frequency diagram?
What's important when choosing the scale for the frequency axis?
Is this graphical representation helpful in addressing the hypothesis? If not, why not and what would you change?
When considering a range of graphs representing the same data:
- Which is the easiest to interpret? Why?
- Which is most helpful in addressing the hypothesis? Why?