Stamp Thickness Dataset
Thicknesses of 482 postage stamps of the 1872 Hidalgo issue of Mexico.
data(stamp)
Data frame with thick (stamp thickness) and count
(number of stamps) variables.
Izenman and Sommer (1988).
Izenman, A. J. and Sommer, C. J. (1988). Philatelic mixtures and multimodal densities. Journal of the American Statistical Association 73, 602-606.
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