p2.14: Data Set for Problem 2-14

In MPV: Data Sets from Montgomery, Peck and Vining

Data Set for Problem 2-14

Description

The p2.14 data frame has 8 observations on the molar ratio of sebacic acid and the intrinsic viscosity of copolyesters. One is interested in predicting viscosity from the sebacic acid ratio.

Usage

data(p2.14)

Format

This data frame contains the following columns:

ratio

molar ratio

visc

viscosity

Source

Montgomery, D.C., Peck, E.A., and Vining, C.G. (2001) Introduction to Linear Regression Analysis. 3rd Edition, John Wiley and Sons.

References

Hsuie, Ma, and Tsai (1995) Separation and Characterizations of Thermotropic Copolyesters of p-Hydroxybenzoic Acid, Sebacic Acid and Hydroquinone. Journal of Applied Polymer Science, 56, 471-476.

Examples

data(p2.14)
attach(p2.14)
plot(p2.14, pch=16, ylim=c(0,1))
visc.lm <- lm(visc ~ ratio)
summary(visc.lm)
visc.conf <- predict(visc.lm, interval="confidence")
lines(ratio, visc.conf[,2], col="red")
lines(ratio, visc.conf[,3], col="red")
visc.pred <- predict(visc.lm, interval="prediction")
lines(ratio, visc.pred[,2], col="blue")
lines(ratio, visc.pred[,3], col="blue")
detach(p2.14)

MPV documentation built on Sept. 11, 2024, 6:51 p.m.