The number of seedlings in the sampled psus on Santa Cruz Island, California, in 1992 and 1994.
data(santacruz)
This data frame contains the following columns:
tree number
number of seedlings in 1992
number of seedlings in 1994
Peart, D. (1994). Impacts of Feral Pig Activity on Vegetation Patterns Associated with Quercus agrifolia on Santa Cruz Island, California. Ph.D. dissertation. Tempe, AZ: Arizona State University.
Lohr (2021), Sampling: Design and Analysis, 3rd Edition. Boca Raton, FL: CRC Press.
Lu and Lohr (2021), R Companion for Sampling: Design and Analysis, 3rd Edition, 1st Edition. Boca Raton, FL: CRC Press.