multcomp (version 0.4-8)

tire: Tire Wear Data Set

Description

Operating costs per mile for two brands of tires; data set taken from Westfall et al. (1999, p. 109). Confidence bands for difference of regression functions.

Usage

data(tire)

source

P. H. Westfall, R. D. Tobias, D. Rom, R. D. Wolfinger, Y. Hochberg (1999). Multiple Comparisons and Multiple Tests Using the SAS System. Cary, NC: SAS Institute Inc.

Details

See Westfall et al. (1999, p. 109)

Examples

data(tire)
C <- c(0,1,-1,0,10,-10)
for ( x in seq(15,70,5) ) { C <- rbind( C,c(0,1,-1,0,x,-x) ) }
# numerate the contrasts
rownames(C) <- paste("C", 1:nrow(C), sep="")

# simultaneous confidence intervals for difference of regression functions
summary(simint(cost ~ make*mph, data=tire,
               cmatrix=C, eps=0.001))