xmp13.13 {Devore6}R Documentation

data from Example 13.13

Description

The xmp13.13 data frame has 9 rows and 5 columns of data on characteristics of concrete.

Format

This data frame contains the following columns:

x1
the % limestone powder.
x2
the water-cement ratio.
x1x2
the interaction of limestone powder and water-cement ratio.
strength
the 28-day compressive strength (MPa).
absorbability
the absorbability (%).

Source

Devore, J. L. (2003) Probability and Statistics for Engineering and the Sciences (6th ed), Duxbury

Examples

data(xmp13.13)
fm1 <- lm(strength ~ x1 * x2, data = xmp13.13)
summary(fm1)

[Package Devore6 version 0.5-6 Index]