Radioactive Teeth

Actual birth year and birth year estimated from relative radioactivity of the enamel for 20 samples.

Usage

ToothAge

Format

A data frame with 20 observations on the following 2 variables.

actual

a numeric vector

estimated

a numeric vector

Source

Spalding, K.L., B.A. Buchholz, L.-E. Bergman, H. Druid, and J. Frisén. 2005. Age written in teeth by nuclear tests. Nature 437: 333-334.

Examples

str(ToothAge)
#> 'data.frame':	20 obs. of  2 variables:
#>  $ actual   : int  1951 1951 1958 1963 1964 1964 1970 1972 1973 1972 ...
#>  $ estimated: int  1956 1954 1953 1963 1963 1965 1968 1969 1970 1972 ...
xyplot(actual ~ estimated, ToothAge)