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(b)Make a boxplot of Petal.Length for all 150 observations. What features of the distribution are apparent in the histogram in (a) but not the box plot?
(c)Make a side-by-side boxplot to compare the petal length of the 3 species of iris. Compare the distributions of the petal length of the 3 species. Use the side-by-side boxplot to explain the shape of the histogram in part (a). (d)Make a side-by-side boxplot to compare the sepal length of the 3 species of iris.
(e)The iris data set came from a problem in taxonomy: can we find some characteristics that are easy to measure to tell two or more similar species apart? If you were given an iris from one of the 3 species, but not told which one, will you measure the petal length or the sepal length to tell which species it is? Explain your answer. (f)Make a scatter plot of petal length vs. petal width for the three species. Use different colors or shapes of points to represent the three species. From the scatter plot you make, if you have a irisplant with Petal Width = 1.5 cm and Petal Length = 4 cm, which species do you think it is?