Smokyph {BSDA} | R Documentation |
Data for Exercises 6.40, 6.59, 7.10, and 7.35
Smokyph
A data frame with 75 observations on the following 5 variables.
waterph
code
high
low
elev
SRES1
FITS1
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Duxbury
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)