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ex1120

Was Tyrannosaurus Rex Warm-Blooded?


Description

Data are the isotopic composition of structural bone carbonate (X) and the isotopic composition of the coexisting calcite cements (Y) in 18 bone samples from a specimen of the dinosaur Tyrannosaurus rex. Evidence that the mean of Y is positively associated with X was used in an argument that the metabolic rate of this dinosaur resembled warm-blooded more than cold-blooded animals.

Usage

ex1120

Format

A data frame with 18 observations on the following 2 variables.

Carbonat

isotopic composition of bone carbonate

Calcite

isotopic composition of calcite cements

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Barrick, R.E. and Showers, W.J. (1994). Thermophysiology of Tyrannosaurus rex: Evidence from Oxygen Isotopes, Science 265(5169): 222–224.

See Also

Examples

str(ex1120)

Sleuth2

Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd Ed)"

v2.0-5
GPL (>= 2)
Authors
Original by F.L. Ramsey and D.W. Schafer; modifications by Daniel W. Schafer, Jeannie Sifneos and Berwin A. Turlach; vignettes contributed by Nicholas Horton, Kate Aloisio and Ruobing Zhang, with corrections by Randall Pruim
Initial release
2019-01-24

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