babies_crawl {openintro}

Crawling age

Description

Crawling age of babies along with the average outdoor temperature at 6 months of age.

Usage

babies_crawl

Format

A data frame with 12 observations on the following 5 variables.

birth_month

A factor with levels corresponding to months

avg_crawling_age

a numeric vector

sd

a numeric vector

n

a numeric vector

temperature

a numeric vector

Source

J.B. Benson. Season of birth and onset of locomotion: Theoretical and methodological implications. In: Infant behavior and development 16.1 (1993), pp. 69-81. issn: 0163-6383.

Examples

library(ggplot2)

ggplot(babies_crawl, aes(x = temperature, y = avg_crawling_age)) +
  geom_point() +
  labs(x = "Temperature", y = "Average crawling age")