Stamp {BSDA} | R Documentation |
Data for Statistical Insight Chapter 1 and Exercise 5.110
Stamp
A data frame with 485 observations on the following 3 variables.
thickness
thick
freq
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Duxbury
str(Stamp) attach(Stamp) hist(thickness,prob=TRUE,col="lightblue") lines(density(thickness),lwd=2,col="blue") t.test(thickness,conf.level=.99)$conf detach(Stamp)