pcd {lrmest}

Portland Cement Dataset

Description

These data come from an experiment investigation of the heat evolved during the setting and hardening of Portland cements of varied composition and the dependence of this heat on the percentages of four components in the clinkers from which the cement was produced.

Usage

data(pcd)

Format

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

Y

The heat evolved after 180 days of caring. (Calories per gram)

X1

Tricalcium Aluminate.

X2

Tricalcium Silicate.

X3

Tetracalcium Aluminoferrite.

X4

\beta Dicalcium Silicate.

References

Mishra, S.K. (2004) Estimation under Multicollinearity: Application of Restricted Liu and Maximum Entropy Estimators to the Portland Cement Dataset,North-Eastern Hill University (NEHU).

Examples

data(pcd)