greek

greek (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

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students (greek)

All Rs Female Male

Mean (Std. Dev.) 0.12 (0.32) 0.11 (0.32) 0.13 (0.34)

0 21030 88.04% 14532 88.65% 6428 86.63%

1 2857 11.96% 1860 11.35% 992 13.37%

Missing 244
(1.01%) – 87
(0.53%) – 41
(0.55%) –

Total 24131 100% 16479 100% 7461 100%

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

5110, 3193, 2464, 2285, 353
2024, 1425, 1156, 976, 215

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

3518, 2025, 1591, 1470, 215
1485, 891, 726, 611, 129

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 (greek)
	All Rs		Female		Male
Mean (Std. Dev.)	0.12 (0.32)		0.11 (0.32)		0.13 (0.34)
0	21030	88.04%	14532	88.65%	6428	86.63%
1	2857	11.96%	1860	11.35%	992	13.37%
Missing	244 (1.01%)	–	87 (0.53%)	–	41 (0.55%)	–
Total	24131	100%	16479	100%	7461	100%