Fig. 5: Box plots of trace elements in representative samples from Yingou site and Yaozhou kiln.
From: Provenance study of Tang-dynasty black-glazed porcelains unearthed at the Yingou site
Box plots summarize concentrations of selected trace elements (e.g., Zr, Nb, Cr, Ni, V, Sr, Rb, Tl, Pb) for the Yingou (T-YG) and Yaozhou (T-YZY) groups. Group identifiers and plot conventions (median, interquartile range, whiskers, and outliers if present) are as shown in the figure.
