ChickWeight: Chick weight data from Preece (1982, Table 11)

In PairedData: Paired Data Analysis

Description

This dataset presents 10 paired data corresponding to the weights of chicks, two from ten families, reared in confinement or on open range.

Usage

data(ChickWeight)

Format

A dataframe with 10 rows and 3 columns:

[,1]	Chicks	factor
[,2]	Confinement	numeric	chick weight (ounces)
[,3]	OpenRange	numeric	chick weight

Source

Paterson, D.D. (1939) Statistical Techniques in Agricultural Research. McGrw-Hill: New-York.

References

Preece, D.A. (1982) t is for trouble (and textbooks): a critique of some examples of the paired-samples t-test. The Statistician, 31 (2), 169-195.

Examples

data(ChickWeight)

# Look at the interesting discussion in Preece (1982)
# about degree of precision and t test
with(ChickWeight,plot(paired(Confinement,OpenRange)))
with(ChickWeight,stem(Confinement-OpenRange,scale=2))

Example output

Loading required package: MASS
Loading required package: gld
Loading required package: mvtnorm
Loading required package: lattice
Loading required package: ggplot2

Attaching package: 'PairedData'

The following object is masked from 'package:base':

    summary


  The decimal point is at the |

  -2 | 0
  -1 | 
  -0 | 
   0 | 0
   1 | 00
   2 | 00
   3 | 00
   4 | 0
   5 | 
   6 | 0

PairedData documentation built on May 1, 2019, 6:49 p.m.