The data were collected from 88 school children in Vermont. The variables are:

• AddSc – a composite variable for which higher scores indicate greater frequency of symptoms associated with attention deficit disorder.
• Gender – male (1) or female (2).
• Repeat – repeated at least one grade (1) or never repeated a grade (0).
• IQ – intelligence test score.
• Engl – English class in 9th grade was college prep (1), general (2) or remedial (3).
• EngG – grade in that English class: A (4), B (3), C (2), D (1) or F (0).
• GPA – grade point average in 9th grade.
• SocProb – classified has having (1) or not having (0) social problems in the 9th grade.
• DropOut – dropped out of school before completing high school (1) or completed high school (0).

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