darwin {boot} | R Documentation

## Darwin's Plant Height Differences

### Description

The `darwin` data frame has 15 rows and 1 columns.

Charles Darwin conducted an experiment to examine the superiority of cross-fertilized plants over self-fertilized plants. 15 pairs of plants were used. Each pair consisted of one cross-fertilized plant and one self-fertilized plant which germinated at the same time and grew in the same pot. The plants were measured at a fixed time after planting and the difference in heights between the cross- and self-fertilized plants are recorded in eighths of an inch.

### Usage

    darwin

### Format

This data frame contains the following column:

`y`
  The difference in heights for the pairs of plants (in units of 0.125 inches).

### Source

The data were obtained from

Fisher, R.A. (1935) Design of Experiments. Oliver and Boyd.

### References

Darwin, C. (1876) The Effects of Cross- and Self-fertilisation in the Vegetable Kingdom. John Murray.

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

[Package boot version 1.2-24 Index]