Question: A British statistician and biologist introduced a data set which consists of 50 samples from each of two species of Iris (Iris setosa and Iris

A British statistician and biologist introduced a data set which consists of 50 samples from each of two species of Iris (Iris setosa and Iris versicolor). The width of sepals was measured from each sample in centimetres. This data set is seen below. Does the data provide evidence for a difference in the sepal widths between Iris setosa and Iris versicolor?

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