bootstrap (version 2019.6)

stamp: Data on Thickness of Stamps

Description

Thickness in millimeters of 485 postal stamps, printed in 1872. The stamp issue of that year was thought to be a "philatelic mixture", that is, printed on more than one type of paper. It is of historical interest to determine how many different types of paper were used.

Usage

data(stamp)

Arguments

Format

A data frame with 485 observations on the following variable.

Thickness

Thickness in millimeters, a numeric vector

Details

In the book, this is used to exemplify determination of number of modes. It is also used for kernel density estimation.

Examples

Run this code
# NOT RUN {
summary(stamp)
with(stamp, {hist(Thickness);
             plot(density(Thickness), add=TRUE)})
# }

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