p2.7 {MPV}

Data Set for Problem 2-7

Description

The p2.7 data frame has 20 observations on the purity of oxygen produced by a fractionation process. It is thought that oxygen purity is related to the percentage of hydrocarbons in the main condensor of the processing unit.

Usage

data(p2.7)

Format

This data frame contains the following columns:

purity

oxygen purity (percentage)

hydro

hydrocarbon (percentage)

Source

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

Examples

data(p2.7)
attach(p2.7)
purity.lm <- lm(purity ~ hydro)
summary(purity.lm)
# confidence interval for mean purity at 1% hydrocarbon:
predict(purity.lm,newdata=data.frame(hydro = 1.00),interval="confidence")
detach(p2.7)