Study on Compaction of Reclaimed Soil of Nonmetallic Mining Area in Northern Foothills of Tianshan Mountains in Xinjiang, China

Table 3

Results of the independent sample test.

No.	Null hypothesis	Analytical method	Significance	Decision
1	The distribution of the porosity is the same regardless of the soil thickness	Kruskal–Wallis test of independent samples	0.000 < 0.05	Reject
2	The distribution of the porosity is the same regardless of the compaction times	Kruskal–Wallis test of independent samples	0.008 < 0.05	Reject
3	The distribution of the porosity is the same regardless of the depths of sampling	Mann–Whitney U test of independent samples	0.496 > 0.05	Accept