heads {calibrate}

Dimensions of heads of first and second sons for 25 families

Description

Variables X1 and X2 are the head length and head breadth of the first son and Y1 and Y2 are the same variables for the second son.

Usage

data(heads)

Format

A data frame containing 25 observations.

Source

Mardia, 1979, p. 121

References

Frets, G. P. (1921) Heredity of head form in man, Genetica 3, pp. 193-384.

Mardia, K. V. and Kent, J. T. and Bibby, J. M. (1979) Multivariate Analysis. Academic Press London.

Anderson, T. W. (1984) An Introduction to Multivariate Statistical Analysis. New York: John Wiley, Second edition.