Ecology: Vegetation Wild irises are beautiful flowers found throughout the United States, Canada, and northern Europe. This problem concerns the length of the sepal (leaf-like part covering the flower) of different species of wild iris. Data are based on information taken from an article by R. A. Fisher in Annals of Eugenics (Vol. 7, part 2, pp. 179–188).

Measurements of sepal length in centimeters from random samples of Iris setosa (I), Iris versicolor (II), and Iris virginica (III) are as follows:

I II III 5.4 5.5 6.3 4.9 6.5 5.8 5.0 6.3 4.9 5.4 4.9 7.2 4.4 5.2 5.7 5.8 6.7 6.4 5.7 5.5 6.1 Shall we reject or not reject the claim that there are no differences among the population means of sepal length for the different species of iris? Use a 5% level of significance.

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