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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.) 13.47 (8.54) 13.76 (8.69) 12.72 (8.11)
0 2 0.03% 2 0.04% 0 0.00%
1 390 5.20% 293 5.46% 97 4.56%
2 421 5.61% 278 5.18% 142 6.67%
3 317 4.22% 216 4.03% 98 4.60%
4 273 3.64% 188 3.50% 85 3.99%
5 183 2.44% 146 2.72% 37 1.74%
6 257 3.42% 178 3.32% 79 3.71%
7 198 2.64% 134 2.50% 64 3.01%
8 277 3.69% 190 3.54% 86 4.04%
9 539 7.18% 389 7.25% 150 7.05%
10 468 6.23% 318 5.93% 149 7.00%
11 330 4.40% 229 4.27% 101 4.74%
12 213 2.84% 143 2.67% 70 3.29%
13 352 4.69% 237 4.42% 113 5.31%
14 195 2.60% 120 2.24% 75 3.52%
15 217 2.89% 146 2.72% 71 3.33%
16 203 2.70% 132 2.46% 71 3.33%
17 269 3.58% 204 3.80% 64 3.01%
18 213 2.84% 155 2.89% 58 2.72%
19 297 3.96% 200 3.73% 95 4.46%
20 144 1.92% 107 1.99% 37 1.74%
21 143 1.90% 117 2.18% 26 1.22%
22 113 1.51% 89 1.66% 23 1.08%
23 173 2.30% 128 2.39% 45 2.11%
24 126 1.68% 99 1.85% 27 1.27%
25 233 3.10% 186 3.47% 47 2.21%
26 209 2.78% 164 3.06% 45 2.11%
27 209 2.78% 160 2.98% 49 2.30%
28 149 1.98% 124 2.31% 24 1.13%
29 141 1.88% 100 1.86% 40 1.88%
30 206 2.74% 154 2.87% 52 2.44%
31 47 0.63% 38 0.71% 9 0.42%
Missing 164
(2.14%)
101
(1.85%)
62
(2.83%)
Total 7671 100% 5465 100% 2191 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.