understand [Verb] + difficulty [Noun]

Strength Strength Dispersion
A:
55
CHISQ:
42.25
AWT:
2,482,086
TTEST:
4.24
G2:
32.31
FAWT:
21.9
MI:
1.23
LOGLOG:
7.08
JD:
0.84
MI3:
12.79
DICE:
0.31
RANGE: