Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.
Estimating Correlation Practise the skill of estimating the correlation of data on a scatter graph in this self marking exercise.
Correlation Arrange the given statements in groups to show the type of correlation they have.
Odd Scatter Out Just by looking at the scatter graphs can you decide which is the odd one out according to their summary statistics?
Here is an exam-style questions on this statement:
Click on a topic below for suggested lesson Starters, resources and activities from Transum.
Furthermore
If you use the TI-Nspire calculator here are the instructions for finding the Spearman's rank correlation coefficient.
THE CORRELATION COEFFICIENT (r)
| Value | Strength of Association |
|---|---|
| \( r = -1 \) | perfect negative correlation |
| \( -1 \lt r \le -0.90 \) | very strong negative correlation |
| \( -0.90 \lt r \le -0.75 \) | strong negative correlation |
| \( -0.75 \lt r \le -0.50 \) | moderate negative correlation |
| \( -0.50 \lt r \le -0.25 \) | weak negative correlation |
| \( -0.25 \lt r \lt 0 \) | very weak negative correlation |
| \( r = 0 \) | no correlation |
| \( 0 \lt r \lt 0.25 \) | very weak positive correlation |
| \( 0.25 \le r \lt 0.50 \) | weak positive correlation |
| \( 0.50 \le r \lt 0.75 \) | moderate positive correlation |
| \( 0.75 \le r \lt 0.90 \) | strong positive correlation |
| \( 0.90 \le r \lt 1 \) | very strong positive correlation |
| \( r = 1 \) | perfect positive correlation |
This video on outliers is from Revision Village and is aimed at students taking the IB Maths Standard level course
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