ACSWR: stiff – R documentation

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stiff

The Board Stiffness Dataset

Description

Four measures of stiffness of 30 boards are available. The first measure of stiffness is obtained by sending a shock wave down the board, the second measure is obtained by vibrating the board, and remaining are obtained from static tests.

Usage

data(stiff)

Format

A data frame with 30 observations on the following 4 variables.

x1: first measure of stiffness is obtained by sending a shock wave down the board
x2: second measure is obtained by vibrating the board
x3: third measure is obtained by a static test
x4: fourth measure is obtained by a static test

References

Johnson, R.A., and Wichern, D.W. (1982-2007). Applied Multivariate Statistical Analysis, 6e. Pearson Education.

Examples

data(stiff)
colMeans(stiff)
var(stiff)
pairs(stiff)

ACSWR

A Companion Package for the Book "A Course in Statistics with R"

v1.0

GPL-2

Authors

Prabhanjan Tattar

Initial release

2015-09-05