FERTILIZE: Cross and Auto Fertilization

In PASWR2: Probability and Statistics with R, Second Edition

Description

Plants' heights in inches obtained from two seeds, one obtained by cross fertilization and the other by auto fertilization, in two opposite but separate locations of a pot are recorded.

Usage

FERTILIZE

Format

A data frame with 30 observations on the following 3 variables:

• height (height of plant in inches)

• fertilization (a factor with levels cross and self)

• pot (a factor with fifteen levels)

Source

Darwin, C. 1876. The Effect of Cross and Self-Fertilization in the Vegetable Kingdom. D. Appleton and Company.

References

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. Probability and Statistics with R, Second Edition. Chapman & Hall / CRC.

Examples

p <- ggplot(data = FERTILIZE, aes(x = height, color = fertilization))
p + geom_density()
t.test(height ~ fertilization, data = FERTILIZE)

Example output

Loading required package: lattice
Loading required package: ggplot2

	Welch Two Sample t-test

data:  height by fertilization
t = 2.4371, df = 22.164, p-value = 0.02328
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
 0.3909566 4.8423767
sample estimates:
mean in group cross  mean in group self 
           20.19167            17.57500 

PASWR2 documentation built on Sept. 5, 2021, 5:44 p.m.