daphniastrat | R Documentation |
These data are from a stratified random sample from three layers of a lake: epilimnion, thermocline, and hypolimnion. The volumes of these layers are approximately 100kL, 200kL, and 400kL respectively, so that the sampling fractions are 1/7, 2/7, and 4/7, respectively. The sampling units are one liter containers of water, and the target variable is daphnia per liter.
daphniastrat
A data frame with 45 observations and two variables:
layer from which the water sample was taken
number of daphnia in the liter of water
Barrett, J. P. & Nutt, M. E. (1979). Survey sampling in the environmental sciences: A computer approach. Wentworth, NH: COMPress, Inc.
Gregoire, T. G. & Valentine, H. T. (2007). Sampling strategies for natural resources and the environment. Boca Raton, FL: Chapman & Hall/CRC.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.