Old Faithful Geyser Data
Waiting time between eruptions and the duration of the eruption for the Old Faithful geyser in Yellowstone National Park, Wyoming, USA.
A data frame with 272 observations on 2 variables.
Eruption time in mins
Waiting time to next eruption (in mins)
A closer look at faithful.eruptions reveals that these are heavily rounded times originally in seconds, where multiples of 5 are more frequent than expected under non-human measurement. For a better version of the eruption times, see the example below.
There are many versions of this dataset around: Azzalini and Bowman (1990) use a more complete version.
Härdle, W. (1991) Smoothing Techniques with Implementation in S. New York: Springer.
Azzalini, A. and Bowman, A. W. (1990). A look at some data on the Old Faithful geyser. Applied Statistics 39, 357–365.