chickwts

Chicken Weights by Feed Type

An experiment was conducted to measure and compare the effectiveness of various feed supplements on the growth rate of chickens.

Keywords
datasets
Usage
chickwts
Details

Newly hatched chicks were randomly allocated into six groups, and each group was given a different feed supplement. Their weights in grams after six weeks are given along with feed types.

Format

A data frame with 71 observations on the following 2 variables.

weight
a numeric variable giving the chick weight.
feed
a factor giving the feed type.

Source

Anonymous (1948) Biometrika, 35, 214.

References

McNeil, D. R. (1977) Interactive Data Analysis. New York: Wiley.

Aliases
  • chickwts
Examples
library(datasets) require(stats); require(graphics) boxplot(weight ~ feed, data = chickwts, col = "lightgray", varwidth = TRUE, notch = TRUE, main = "chickwt data", ylab = "Weight at six weeks (gm)") anova(fm1 <- lm(weight ~ feed, data = chickwts)) opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0), mar = c(4.1, 4.1, 2.1, 1.1)) plot(fm1) par(opar)
Documentation reproduced from package datasets, version 3.1.2, License: Part of R 3.1.2

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