EVOLUTION-MANAGER
Edit File: chickwts.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Chicken Weights by Feed Type</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for chickwts {datasets}"><tr><td>chickwts {datasets}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Chicken Weights by Feed Type</h2> <h3>Description</h3> <p>An experiment was conducted to measure and compare the effectiveness of various feed supplements on the growth rate of chickens. </p> <h3>Usage</h3> <pre>chickwts</pre> <h3>Format</h3> <p>A data frame with 71 observations on the following 2 variables. </p> <dl> <dt><code>weight</code></dt><dd><p>a numeric variable giving the chick weight.</p> </dd> <dt><code>feed</code></dt><dd><p>a factor giving the feed type.</p> </dd> </dl> <h3>Details</h3> <p>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. </p> <h3>Source</h3> <p>Anonymous (1948) <em>Biometrika</em>, <b>35</b>, 214. </p> <h3>References</h3> <p>McNeil, D. R. (1977) <em>Interactive Data Analysis</em>. New York: Wiley. </p> <h3>Examples</h3> <pre> 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) </pre> <hr /><div style="text-align: center;">[Package <em>datasets</em> version 3.6.0 <a href="00Index.html">Index</a>]</div> </body></html>