retention [Noun] + improve [Verb]

Strength Strength Dispersion
A:
5
CHISQ:
25.17
AWT:
13,196,355
TTEST:
1.91
G2:
14.8
FAWT:
4.12
MI:
2.78
LOGLOG:
6.46
JD:
0.56
MI3:
7.43
DICE:
0.09
RANGE: