Format
This data frame contains the following columns:
hs-
high school rank:
"L", "M" and "U" for lower,
middle and upper third.
phs-
post high school status: Enrolled in college, (
"C"), enrolled in
non-collegiate school, ("N"), employed full-time, ("E")
and other, ("O").
fol-
father's occupational level, (seven levels,
"F1", "F2",
..., "F7").
sex-
sex: factor with levels
"F" or "M".
f-
frequency.
Source
From R. L. Plackett, (1974) The Analysis of Categorical
Data. London: Griffin who quotes the data from Hoyt, C. J., Krishnaiah, P. R. and Torrance, E. P. (1959) Analysis of
complex contingency tables, J. Exp. Ed. 27, 187--194.