Description Usage Format Source
Data from a report of a survey which investigated whether snoring was related to heart disease. Those surveyed were classified according to the amount they snored, on the basis of reports from their spouses.
1 |
Data frame with 8 observations on the following 3 variables
pat
presence of heart disease, factor with 2 levels (no, si
)
russ
level of snoring, factor with 4 levels (mai
, no snoring;
a volte
, occasional snoring; spesso
, snoring nearly every night;
sempre
, alwayssnoring;)
freq
frequency observed in the cross classification of the previous 2 variables
Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J., Ostrowski, E. (1994). Small Data Sets. London Chapman and Hall/CRC.
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