R Dataset / Package MASS / cement

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How to Compute the Median

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<iframe src="https://embed.picostat.com/r-dataset-package-mass-cement.html" frameBorder="0" width="100%" height="307px" />
Attachment Size
dataset-98124.csv 77.01 KB
Dataset License
GNU General Public License v2.0
Documentation License
GNU General Public License v2.0
Dataset Help

On this Picostat.com statistics page, you will find information about the cement data set which pertains to Heat Evolved by Setting Cements. The cement data set is found in the MASS R package. You can load the cement data set in R by issuing the following command at the console data("cement"). This will load the data into a variable called cement. If R says the cement data set is not found, you can try installing the package by issuing this command install.packages("MASS") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the cement R data set. The size of this file is about 78,861 bytes.

Documentation

Heat Evolved by Setting Cements

Description

Experiment on the heat evolved in the setting of each of 13 cements.

Usage

cement

Format

x1, x2, x3, x4

Proportions (%) of active ingredients.

y

heat evolved in cals/gm.

Details

Thirteen samples of Portland cement were set. For each sample, the percentages of the four main chemical ingredients was accurately measured. While the cement was setting the amount of heat evolved was also measured.

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

Hald, A. (1957) Statistical Theory with Engineering Applications. Wiley, New York.

Examples

lm(y ~ x1 + x2 + x3 + x4, cement)
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Dataset imported from https://www.r-project.org.

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