Article Review
Article Review
Graphical analysis provides a visual presentation of data (Terpening, 2011). The authors use boxplot for the graphical analysis. Box plots are used to show differences in the means as well as the dispersion for different groups (Rubin, 2012). In the study, the boxplots show the concentration of various mineral across the different location as well as the dispersion of the concentration for each group. The important features are the dispersion measures and central tendency measures. Dispersion is shown by range while the central tendency is shown by mean (Jackson, 2012). The graphs clearly show the means and ...
