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.
A data frame with 30 observations on the following 3 variables:
height (height of plant in inches)
fertilization (a factor with levels
pot (a factor with fifteen levels)
Darwin, C. 1876. The Effect of Cross and Self-Fertilization in the Vegetable Kingdom. D. Appleton and Company.
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. Probability and Statistics with R, Second Edition. Chapman & Hall / CRC.
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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
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