daphniastrat: Stratified random sample of daphnia counts.
In trobinj/trtools: Miscellaneous Tools for Teaching Statistics
daphniastrat R Documentation
Stratified random sample of daphnia counts.
Description
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.
Usage
daphniastrat
Format
A data frame with 45 observations and two variables:
- layer:
layer from which the water sample was taken
- count:
number of daphnia in the liter of water
Source
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.
trobinj/trtools documentation built on Jan. 28, 2024, 3:20 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
| daphniastrat | R Documentation |
Stratified random sample of daphnia counts.
Description
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.
Usage
daphniastrat
Format
A data frame with 45 observations and two variables:
- layer:
layer from which the water sample was taken
- count:
number of daphnia in the liter of water
Source
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.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.