BSDA (version 0.1)

Smokyph: Water pH levels of 75 water samples taken in the Great Smoky Mountains

Description

Data for Exercises 6.40, 6.59, 7.10, and 7.35

Usage

Smokyph

source

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Duxbury

Examples

str(Smokyph)
attach(Smokyph)
t.test(waterph,mu=7)
sign.test(waterph,md=7)
tapply(waterph,code,mean)
stripchart(waterph~code,method="stack",pch=19,col=c("red","blue"))
qqnorm(waterph[code=="low"])
qqnorm(waterph[code=="high"])
t.test(waterph[code=="low"],waterph[code=="high"])
t.test(waterph[code=="low"],waterph[code=="high"],conf.level=.90)$conf
detach(Smokyph)