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\title{Mathematics achievement scores}
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The \code{MathAchieve} data frame has 7185 rows and 6 columns.
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This data frame contains the following columns:
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an ordered factor identifying the school that the student attends
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indicating if the student is a member of a minority racial group.
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a numeric vector of socio-economic status.
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a numeric vector of mathematics achievement scores.
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a numeric vector of the mean SES for the school.
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Each row in this data frame contains the data for one student.