turkey: Turkey data, all sources

In alr4: Data to Accompany Applied Linear Regression 4th Edition

Description

Data from an experiment on the growth of turkeys. 60 pens of turkeys were grown with a similar diet, supplemented with a dose of methionine from one of three sources. The response is average pen weight. Recorded is dose, source, m, always 5 except for dose=0, average weight gain, and within group SS.

Format

This data frame contains the following columns:

A

Dose: Amount of supplement as a percent of the total diet

Gain

Ave. weight gain, over all replications

S

A factor for the source of methionine, three levels numbers 1, 2 and 3.

m

Number of replications or pens

SD

SD of the m pens with the same values of S and A.

Source

R. D. Cook and J. Witmer (1985). A note on parameter-effects curvature. Journal of the American Statistical Association, 80, 872–878.

References

Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.

Examples

head(turkey)

Example output

Loading required package: car
Loading required package: carData
Loading required package: effects
lattice theme set by effectsTheme()
See ?effectsTheme for details.
     A  Gain S  m        SD
1 0.00 623.0 1 10 19.459359
2 0.04 680.2 1  5  7.190271
3 0.10 721.4 1  5 21.454603
4 0.16 750.4 1  5 17.487138
5 0.28 789.4 1  5 14.673105
6 0.04 672.2 2  5 26.508489

alr4 documentation built on May 2, 2019, 6:40 p.m.