The Investigation of relationships between real data is not attempted here.
Instead, within Data Handling, we have looked for Problems that will assist the understanding of the nature of the various 'standard' measures we expect students to be able to use - the behaviour of averages and measures of spread, for example.
Probability is more susceptible to a problem-solving approach, and there are a number of nice Problems here - the 'results' from which can then be tested experimentally !
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