twenty.or.above

twenty.or.above (in Demographics)

Variable Summary	Undergrad	Freshman	Sophomore	Junior	Senior
Sexually active students:	Undergrad	Freshman	Sophomore	Junior	Senior
Casual-sexually active students:	Undergrad	Freshman	Sophomore	Junior	Senior

This simply indicates whether the student is at least 20

This variable, twenty.or.above, is constructed using information from the variable, age.

students (twenty_or_above)

All Rs Female Male

Mean (Std. Dev.) 0.53 (0.50) 0.52 (0.50) 0.57 (0.50)

0 11174 46.63% 7942 48.29% 3203 43.00%

1 12790 53.37% 8505 51.71% 4245 57.00%

Missing 167
(0.69%) – 32
(0.19%) – 13
(0.17%) –

Total 24131 100% 16479 100% 7461 100%

Negative (no/false) Positive (yes/true)

5137, 3215, 2474, 2295, 353
2038, 1430, 1160, 980, 216

Negative (no/false) Positive (yes/true)

3537, 2041, 1598, 1477, 215
1496, 895, 729, 615, 130

These graphs reflect only undergraduates attending 4-year colleges who are of normative age -- 18, 19, 20, 21, or 22, +/- 1, for freshman, sophomores, juniors, seniors, and later undergraduates, respectively. Solid lines represent women. Dotted lines represent men.

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students (twenty_or_above)
	All Rs		Female		Male
Mean (Std. Dev.)	0.53 (0.50)		0.52 (0.50)		0.57 (0.50)
0	11174	46.63%	7942	48.29%	3203	43.00%
1	12790	53.37%	8505	51.71%	4245	57.00%
Missing	167 (0.69%)	–	32 (0.19%)	–	13 (0.17%)	–
Total	24131	100%	16479	100%	7461	100%