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TABLE XII. CHI-SQUARE DISTRIBUTION LOWER LIP TO Sn-Pog PLANE
CAUCASIANS

N=40

# %
AFRICAN AMERICANS

N=40

# %
Pre- and Post Treatment within Desirable Range
Improved with Treatment
Pre- and Post Treatment out of Desirable Range
Pre-treatment Within and Post-treatment out of Desirable Range
7 17.5
5 12.5
17* 42.5
11*** 27.5
22 55
5 12.5
9** 22.5
4**** 10

* Ten started less protrusive and finished less protrusive. Five started more protrusive and finished less protrusive. Nine started more protrusive and finished more protrusive.

** One started less protrusive and finished less protrusive. Eight started more protrusive and finished more protrusive.

***One started within the range and finished less protrusive than desirable.. Ten stared in the range and finished more protrusive than desirable.

**** Three start within the range and finished less protrusive than desirable. One started in the range and finished more protrusive than desirable.