Step 5 Objective
Understand the effect on the mean and median of altering the data.
Interpret diagrams and graphs (including pie charts) and draw simple conclusions based on the shape of graphs and simple statistics for a single distribution.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
What if pupils find this a barrier?
Place cards on a number line.
Repeat, gradually increasing the largest value shown on the cards. Each time, ask the pupil to put a finger on the line where he or she thinks the median will be.
Do the same again, but decrease the smallest value shown on the card. Ask the pupil what is happening to the totals of the cards and therefore what will happen to the mean.
Revisit the approaches in Steps 2, 3 and 4.