Water {PASWR} | R Documentation |
Sodium Content of Water
Description
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.
Format
A data frame with 30 observations on the following 4 variables:
- X
sodium content measured in mg/L
- Y
sodium content measured in mg/L
- Sodium
combined sodium content measured in mg/L
- Source
a factor with levels
X
andY
Source
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.
Examples
with(data = Water,
t.test(X, Y, alternative = "less"))
[Package PASWR version 1.3 Index]