juul | R Documentation |
The juul
data frame has 1339 rows and 6 columns.
It contains a reference sample of the distribution of insulin-like
growth factor (IGF-I), one observation per subject in various ages, with the
bulk of the data collected in connection with school physical
examinations.
juul
This data frame contains the following columns:
age
a numeric vector (years).
menarche
a numeric vector. Has menarche occurred (code 1: no, 2: yes)?
sex
a numeric vector (1: boy, 2: girl).
igf1
a numeric vector, insulin-like growth factor
(\mu\mathrm{g}/\mathrm{l}
).
tanner
a numeric vector, codes 1–5: Stages of puberty ad modum Tanner.
testvol
a numeric vector, testicular volume (ml).
Original data.
plot(igf1~age, data=juul)
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