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. Try to load the Alfalfa data set in R by issuing the following command at the console data("Alfalfa"). This may 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 with library("Stat2Data") followed by data("Alfalfa"). Perhaps strangley, if R gives you no output after entering a command, it means the command succeeded. If it succeeded you can see the data by typing Alfalfa at the command-line which should display the entire dataset.
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.
Growth of alfalfa sprouts in acidic conditions
A dataset with 15 observations on the following 3 variables.
| Height of alfalfa sprouts after four days
| Amount of acid:
a= closest to window through
e=farthest from window
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.
Neumann, A., Richards, A.-L., and Randa, J. (2001).
Effects of acid rain on alfalfa plants. Unpublished manuscript, Oberlin College.
Dataset imported from https://www.r-project.org.