cement: Hald Cement Data

In SMPracticals: Practicals for Use with Davison (2003) Statistical Models

Description

Heat evolved in setting of cement, as a function of its chemical composition.

Usage

data(cement)

Format

A data frame with 13 observations on the following 5 variables.

x1

percentage weight in clinkers of 3CaO.Al2O3

x2

percentage weight in clinkers of 3CaO.SiO2

x3

percentage weight in clinkers of 4CaO.Al2O3.Fe2O3

x4

percentage weight in clinkers of 2CaO.SiO2

y

heat evolved (calories/gram)

Source

Woods, H., Steinour, H. H. and Starke, H. R. (1932) Effect of composition of Portland cement on heat evolved during hardening. Industrial Engineering and Chemistry, 24, 1207–1214.

References

Davison, A. C. (2003) Statistical Models. Cambridge University Press. Page 355.

Examples

data(cement)
lm(y~x1+x2+x3+x4,data=cement)

Example output

Loading required package: ellipse

Attaching package: 'ellipse'

The following object is masked from 'package:graphics':

    pairs


Call:
lm(formula = y ~ x1 + x2 + x3 + x4, data = cement)

Coefficients:
(Intercept)           x1           x2           x3           x4  
    62.4054       1.5511       0.5102       0.1019      -0.1441  

SMPracticals documentation built on May 2, 2019, 11:12 a.m.