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Age and Coronary Heart Disease data
A data.frame with \(100\) observations (rows) and \(3\) variables (columns).
data.frame
Age and presence of coronary heart disease for 100 subjects.
Columns are:
Identification code. \(1\) to \(100\).
Age (years).
Evidence of coronary heart disease? (a factor):
factor
no
yes
H&L 2nd ed. Page 3, Table 1.1.
sig OR
sig
OR