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A researcher finds a strong relationship between income and public transport access when comparing districts, but a weaker relationship when comparing households within each district. What does this suggest?

Answer and explanation

Correct answer: Observed relationships can depend on the level at which data are grouped and analysed

Relationships observed between areas need not match relationships between individuals within those areas. Differences in aggregation and local conditions can change the strength of statistical associations.

Related tags

Aggregation EffectsGeographical ScaleTransport AccessSocial Statistics

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