R Dataset / Package Stat2Data / Alfalfa

Documentation

On this Picostat.com statistics page, you will find information about the Alfalfa data set which pertains to Alfalfa. The Alfalfa data set is found in the Stat2Data R package. You can load the Alfalfa data set in R by issuing the following command at the console data("Alfalfa"). This will load the data into a variable called Alfalfa. If R says the Alfalfa data set is not found, you can try installing the package by issuing this command install.packages("Stat2Data") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Alfalfa R data set. The size of this file is about 279 bytes.


Alfalfa

Description

Growth of alfalfa sprouts in acidic conditions

Format

A dataset with 15 observations on the following 3 variables.

Ht4 Height of alfalfa sprouts after four days
Acid Amount of acid: 1.5HCl, 3.0HCl, or water
Row a= closest to window through e=farthest from window

Details

Some students were interested in how an acidic environment might affect the growth of plants. They planted alfalfa seeds in 15 cups and randomly chose five to get plain water, five to get a moderate amount of acid (1.5M HCl), and five to get a stronger acid solution (3.0M HCl). The plants were grown in an indoor room so the students assumed that the distance from the main source of daylight (a window) might have an affect on growth rates. For this reason, they arranged the cups in five rows of three with one cup from each Acid level in each row. These are labeled in the data set as Row: a= farthest from the window through e=nearest to the window.

Source

Neumann, A., Richards, A.-L., and Randa, J. (2001). Effects of acid rain on alfalfa plants. Unpublished manuscript, Oberlin College.

Examples

data(Alfalfa)
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Dataset imported from https://www.r-project.org.

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Attachment Size
dataset-55576.csv 279 bytes
Dataset License
GNU General Public License v2.0
Documentation License
GNU General Public License v2.0