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Day 1: Introduction to multi-level data problems

Day 1: Introduction to multi-level data problems

Day 1: Introduction to multi-level data problems

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Long v. wide <strong>data</strong> format: PPMD example<br />

◮ The PPMD <strong>data</strong>set is organized as long <strong>data</strong>, where the basic<br />

unit of variation is the Score variable

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