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A researcher classifies students according to their residence (urban or rural) and hours of paid work per week. He randomly selects one student. Residence 1-10

A researcher classifies students according to their residence (urban or rural) and hours of paid work per week. He randomly selects one student.

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Residence 1-10 11-20 Over 20 Urban 0.06 0.20 0.15 0.06 Rural 0.12 0.18 0.20 0.03

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