xmp13.12 {Devore5}R Documentation

data from Example 13.12

Description

The xmp13.12 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.
28-day.compt.str..(Mpa)
the 28-day compressive strength (MPa).
Absorbability.(%)
the absobability (%).

Source

Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury

Examples

data(xmp13.12)
fm1 <- lm(strength ~ x1 * x2, data = xmp13.12)
summary(fm1)

[Package Contents]