stamp Stamp Thickness Dataset stamp

Usage:

data(stamp)

Format:

Data frame with thick (stamp thickness) and count (number of stamps) variables.

Description:

Thicknesses of 482 postage stamps of the 1872 Hidalgo issue of Mexico.

Source:

Izenman and Sommer (1988).

References:

Izenman, A. J. and Sommer, C. J. (1988). Philatelic mixtures and multimodal densities. Journal of the American Statistical Association 73, 602-606.

Key Words:

datasets
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