Figure 1.

Box and whiskers plot showing the distributions of the measured concentrations for each metal. Corresponding numeric data are provided in Table 2 for all samples (n = 32). Boxes extend from the 25th to the 75th percentile, horizontal bars inside the boxes represent the median, diamonds represent the mean, whiskers extend to maximum and minimum observations within 1.5 times the length of the interquartile range above and below the 75th and 25th percentiles, respectively, and outliers are represented as circles.