penny {gss}

Thickness of US Lincoln Pennies

Description

Thickness of US Lincoln pennies minted during years 1945 through 1989.

Usage

data(nox)

Format

A data frame containing 90 observations on the following variables.

year	Year minted.
mil	Thickness in mils.

Source

Scott, D. W. (1992), Multivariate Density Estimation: Theory, Practice and Visualization. New York: Wiley.

References

Gu, C. (1995), Smoothing spline density estimation: Conditional distribution, Statistica Sinica, 5, 709–726.

Scott, D. W. (1992), Multivariate Density Estimation: Theory, Practice and Visualization. New York: Wiley.