openintro (version 2.4.0)

lizard_run: Lizard speeds

Description

Data on top speeds measured on a laboratory race track for two species of lizards: Western fence lizard (Sceloporus occidentalis) and Sagebrush lizard (Sceloporus graciosus).

Usage

lizard_run

Format

A data frame with 48 observations on the following 3 variables.

top_speed

Top speed of lizard, meters per second.

common_name

Common name: Western fence lizard and Sagebrush lizard.

scientific_name

Scientific name (Genus and species): Sceloporus occidentalis and Sceloporus graciosus.

Examples

library(ggplot2)
library(dplyr)

# Top speed by species
ggplot(lizard_run, aes(x = top_speed, color = common_name, fill = common_name)) +
  geom_density(alpha = 0.5)

# Top speed summary statistics by species
lizard_run %>%
  group_by(common_name) %>%
  summarise(
    n    = n(),
    mean = mean(top_speed),
    sd   = sd(top_speed)
  )