darwin {evidence}

Charles Darwin's (1876) data on the fecundity of selfed and crossed corn plants.

Description

Charles Darwin(1876) provided data on the difference in the heights attained by selfed and crossed mother plants.

Usage

data(darwin)

Format

A data frame with 15 observations on the following variable:

difference

the difference in height in inches between each paired pair of offspring of a selfed and a crossed mother plant

Source

Darwin, C.R. 1876. The effects of cross and self fertilisation in the vegetable kingdom. John Murray, London.

van Hulst, R. 2018. Evaluating Scientific Evidence. ms.

Examples

data(darwin)
with(darwin, qqnorm(difference) )
with(darwin, qqline(difference) )