A data frame containing 35 observations with the following 5 variables.
Animal
the type of animals; some are repeated
Sex
the sex of the animal; one of F or M
Mass
the mass of the animal (or mean mass of the animals, when multiple animals are represented), in kg
Length
the urethral length of the animal (or the mean, when multiple animals are represented), in mm
SampleSize
the size of the sample represented by the data, usually 1
Details
The data give the urethral length for animals of different sex and mass.
The data were collected using numerous methods; see details in Yang et al. (2014).
References
Patricia J. Yang, Jonathan Pham, Jerome Choo, and David L. Hu (2014)
Duration of urination does not change with body size.
Proceedings of the National Academy of Sciences,
111(33), 11932--11937.