Table 3.

Additional evidence for random assignment of roommates in ROOM: Non-parametric Gamma correlation coefficient and P-value of ${\chi }^2$ test

Strategy	Within-dorm correlation based on pre-college CIRP responses and pre-college Roommate Study responses
Variables	Gamma	P of ${\chi }^2$	N
Pre-college Behavior from CIRP
Had drank	0.16	0.09	434
Smoked cigarettes	−0.41	0.23	438
Partying	−0.05	0.63	416
Hours Socializing with Friends	−0.10	0.49	422
Hours Watching TV	−0.01	0.99	416
Hours Playing Video Games	0.25	0.20	418
Pre-college Behavior from ROOM
Binge drinking	0.022	0.74	1,032
Smoking	−0.009	0.94	1,009
Marijuana use	0.053	0.48	1,027
Partying	0.066	0.56	1,028
Aggressive behavior	−0.052	0.62	1,024
Impulsive behavior	0.162	0.59	1,033
Concurrent sexual partnering:	−0.283	0.31	1,023