Summary of stable nitrogen isotope values in barley grain with statistical data from the archaeological study area.

The Shapiro-Wilk value and Var.test refer to normal distribution and variability of archaeological samples compared to modern samples.

夏皮罗-威尔克统计量（Shapiro-Wilk value）与方差检验（Var.test），用于对比考古样本与现代样本的正态分布特征及数据变异程度。