ChickWeight {PairedData}

Chick weight data from Preece (1982, Table 11)

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))