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Day 1: Introduction to multi-level data problems

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What is <strong>multi</strong><strong>level</strong> <strong>data</strong>?<br />

◮ Multi<strong>level</strong> <strong>data</strong> comes from a <strong>data</strong> structure in the population<br />

that is hierarchical, with sample <strong>data</strong> consisting of a<br />

<strong>multi</strong>stage sample from this population

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