Water {PASWR} | R Documentation |
An independent agency measures the sodium content in 20 samples
from source X
and in 10 samples from source Y
and
stores them in data frame Water
. Data are used in Example 9.12.
Water
A data frame with 30 observations on the following 4 variables:
X
Y
Sodium
Source
X
and Y
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.
attach(Water) t.test(X, Y, alternative="less") detach(Water)