Darwin's cross-fertilized and self-fertilized plants

Pairs of seedlings of the same age, one produced by cross-fertilization and the other by self-fertilization, were grown together so that the members of each pair were reared under nearly identical conditions. The aim was to demonstrate the greater vigour of the cross-fertilized plants. The data are the final heights of each plant after a fixed period of time. Darwin consulted Galton about the analysis of these data, and they were discussed further in Fisher's Design of Experiments.

Usage

darwin

Format

A data frame with 30 rows and 3 columns:

pair: Unique ID for the seedling pair
fertilization: Type of fertilization (`cross` of `self`)
height: Height of the plant in inches

Source

Darwin, C. (1876) The Effect of Cross- and Self-fertilization in the Vegetable Kingdom, 2nd edition, London: John Murray.