extremely significantp < 0.01
There were significant differences between three variables (S, Cyl, LD) and four variables (S, Cyl, LD, CCT) ( p < 0.05), and there were extremely significant differences between three variables (S, Cyl, LD) and five variables (S, Cyl, LD, CCT, E) ( p < 0.01). 3.2.