请教 TFPGA 软件中 Mantel test中结果为

Analysis of E:\TFPGA\MANTEL1.MAN
Comparison of two 3 x 3 matrices.


RESULTS FROM MANTEL TEST.

Correlation of two matrices: r = -.7463

Z from original data: -93.9462
Average Z after 999 permutations: -64.2741

830 out of the 999 permuted data sets had Z-scores
greater than or equal to the original Z-score.
Upper tail probability: p = 0.8310

327 out of the 999 permuted data sets had Z-scores
less than or equal to the original Z-score.
Lower tail probability: p = 0.3280
这是检验两个矩阵的相关性，零假设是两矩阵相关，结果中r是相关系数，就是不知道这里两个概率如何解释？结果是否的显著？也没有地方设置显著性水平，软件的使用说明和帮助中都没看到相关解释。请教高手，谢谢！