Table 1.

Descriptive Statistics for Key Variables

Predictor	N (people or days)	M (SD) or %	Range
Person-Level
Sex [n % male biological sex]	306	39%	0-1
Age	306	16.01 (0.83)	15-17
Race	304
White, NH	115	38%
Asian, NH	43	14%
Black, NH	41	13%
Hispanic	96	32%
Other	9	3%
Lifetime Drinking [n % drinkers]	306	49%	0-1
Attitudes	305	0.58 (1.00)	0-8.29
Prototype Favorability	305	1.61 (0.42)	0.07-3.04
Prototype Similarity	305	0.65 (0.66)	0-2.86
Perceived Vulnerability	305	1.87 (1.09)	0-4
# Drinks of Friend	305	0.71 (1.03)	0-8.86
% of Friends Drinking	303	6.67 (10.07)	0-75
Perceived Friend Approval of Drinking	305	1.01 (0.72)	0-2.98
Perceived Friend Acceptable # Drinks	305	1.20 (1.42)	0-8.86
Day-Level
Attitudes	9174	0.52 (1.21)	0-15
Prototype Favorability	9174	1.62 (0.55)	0-4
Prototype Similarity	9174	0.65 (0.85)	0-4
Perceived Vulnerability	9174	1.89 (1.40)	0-4
# Drinks of Friend	9174	0.67 (1.40)	0-15
% of Friends Drinking	9120	0.04 (0.04)	0-100
Perceived Friend Approval of Drinking	9174	1.01 (0.93)	0-4
Perceived Friend Acceptable # Drinks	9174	1.15 (1.85)	0-15

Note: NH = Non-Hispanic.