infrastructural [Adjective] + improvement [Noun]

Strength Strength Dispersion
A:
5
CHISQ:
474.22
AWT:
22,818,675
TTEST:
2.21
G2:
45.3
FAWT:
2.38
MI:
6.6
LOGLOG:
15.32
JD:
0.4
MI3:
11.24
DICE:
0.15
RANGE: