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signature.day (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

students (signature_day)
 All RsFemaleMale
Mean (Std. Dev.) 13.86 (8.60) 14.17 (8.64) 13.14 (8.43)
0 3 0.02% 2 0.01% 1 0.02%
1 1035 5.27% 724 5.28% 309 5.24%
2 1020 5.19% 653 4.76% 359 6.09%
3 845 4.30% 557 4.06% 284 4.82%
4 764 3.89% 501 3.66% 263 4.46%
5 553 2.81% 404 2.95% 149 2.53%
6 545 2.77% 380 2.77% 164 2.78%
7 558 2.84% 357 2.60% 198 3.36%
8 691 3.52% 473 3.45% 216 3.66%
9 1239 6.31% 854 6.23% 383 6.50%
10 925 4.71% 627 4.57% 297 5.04%
11 679 3.46% 446 3.25% 233 3.95%
12 574 2.92% 373 2.72% 201 3.41%
13 730 3.72% 495 3.61% 231 3.92%
14 571 2.91% 388 2.83% 183 3.10%
15 630 3.21% 429 3.13% 200 3.39%
16 564 2.87% 363 2.65% 201 3.41%
17 719 3.66% 543 3.96% 175 2.97%
18 653 3.32% 484 3.53% 168 2.85%
19 940 4.78% 680 4.96% 254 4.31%
20 571 2.91% 413 3.01% 157 2.66%
21 488 2.48% 355 2.59% 132 2.24%
22 464 2.36% 349 2.55% 113 1.92%
23 447 2.28% 314 2.29% 132 2.24%
24 348 1.77% 258 1.88% 89 1.51%
25 555 2.82% 419 3.06% 135 2.29%
26 549 2.79% 404 2.95% 144 2.44%
27 532 2.71% 389 2.84% 142 2.41%
28 427 2.17% 335 2.44% 91 1.54%
29 370 1.88% 253 1.85% 115 1.95%
30 537 2.73% 388 2.83% 149 2.53%
31 122 0.62% 95 0.69% 27 0.46%
Missing 483
(2.40%)
308
(2.20%)
174
(2.87%)
Total 20131 100% 14013 100% 6069 100%

These tables reflect only undergraduates attending 4-year colleges who are of normative age -- 18, 19, 20, 21, or 22, +/- 1, for freshman, sophomores, juniors, and seniors, respectively.