sheep {GLMsData}

The daily energy requirements for wethers

Description

The daily energy requirements for wethers at various weights

Usage

data(sheep)

Format

A data frame with 64 observations on the following 2 variables.

Weight

the weight of each sheep in kg; a numeric vector

Energy

the daily energy requirements in Mcal per day; a numeric vector

Details

The data measure the daily energy requirement of castrated male (wethers) grazing Merino sheep at various weights (measured by radioassay of urinary carbon dioxide). The energy requirements are useful for predicting meat production.

Source

D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway, and E. Ostrowski (1994) A Handbook of Small Data Sets, London: Chapman and Hall. Dataset 241.

D. Wallach and B. Goffinet (1987) Mean square error of prediction in models for studying ecological systems and agronomic systems. Biometrics, 43(3), 561–573.

References

B. A. Young and J. L. Corbett (1972) Maintenance energy requirement of grazing sheep in relation to herbage availability. Australian Journal of Agricultural Research, 23(1), 57–76.

Examples

data(sheep)
plot(Energy ~ Weight, data=sheep, pch=19)