13.50 More on the analysis using multiple one-way ANOVAs. Refer to Exercise 13.47. Run a separate one-way analysis of variance for each species and summarize the results. Because the amount of water is a quantitative factor, we can also analyze these data using regression. Run simple linear regressions separately for each species to predict nitrogen percent from water. Use plots to determine whether or not a line is a good way to approximate this relationship. Summarize the regression results and compare them with the one-way ANOVA results.