penny | R Documentation |
Thickness of US Lincoln pennies minted during years 1945 through 1989.
data(nox)
A data frame containing 90 observations on the following variables.
year | Year minted. |
mil | Thickness in mils. |
Scott, D. W. (1992), Multivariate Density Estimation: Theory, Practice and Visualization. New York: Wiley.
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.
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