juul: Juul's IGF data

In ISwR: Introductory Statistics with R

Description

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.

Usage

juul

Format

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 (microgram per liter).

tanner

a numeric vector, codes 1–5: Stages of puberty ad modum Tanner.

testvol

a numeric vector, testicular volume (ml).

Source

Original data.

Examples

plot(igf1~age, data=juul)

Example output

ISwR documentation built on Jan. 20, 2020, 5:07 p.m.