Skip to main content
. 2020 Oct 8;6(10):e05163. doi: 10.1016/j.heliyon.2020.e05163

Table 6.

Nonparametric test applied in the comparison of photo-oxidation processes applied in the standard solution of PAHs and in crude oil.

Reference solution
Aromatic fraction
Df Chi-square p-value Df Chi-square p-value
Crude oil 2 14.18 0.0008 2 4.03 0.133
Photo catalysis 2 14.18 2 4.03
Photolysis 2 14.18 2 4.03

Df = degree of freedom.