Waiting times between successive eruptions of the Old Faithful geyser
Data for Exercise 5.12 and 5.111
Faithful
A data frame/tibble with 299 observations on two variables
a numeric vector
a factor with levels 1 and 2
A. Azzalini and A. Bowman, "A Look at Some Data on the Old Faithful Geyser," Journal of the Royal Statistical Society, Series C, 39 (1990), 357-366.
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
t.test(time ~ eruption, data = Faithful)
hist(Faithful$time, xlab = "wait time", main = "", freq = FALSE)
lines(density(Faithful$time))
## Not run:
library(ggplot2)
ggplot2::ggplot(data = Faithful, aes(x = time, y = ..density..)) +
geom_histogram(binwidth = 5, fill = "pink", col = "black") +
geom_density() +
theme_bw() +
labs(x = "wait time")
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.