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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.) 13.67 (8.58) 13.90 (8.65) 13.22 (8.41)
0 1 0.02% 0 0.00% 1 0.06%
1 276 5.44% 180 5.19% 94 5.91%
2 276 5.44% 185 5.34% 87 5.47%
3 227 4.47% 159 4.59% 67 4.21%
4 215 4.24% 145 4.18% 70 4.40%
5 149 2.94% 107 3.09% 42 2.64%
6 140 2.76% 101 2.91% 39 2.45%
7 146 2.88% 85 2.45% 60 3.77%
8 158 3.11% 101 2.91% 56 3.52%
9 326 6.42% 216 6.23% 110 6.92%
10 238 4.69% 162 4.67% 76 4.78%
11 156 3.07% 106 3.06% 50 3.14%
12 163 3.21% 98 2.83% 65 4.09%
13 164 3.23% 103 2.97% 59 3.71%
14 151 2.98% 107 3.09% 44 2.77%
15 168 3.31% 113 3.26% 54 3.40%
16 145 2.86% 97 2.80% 48 3.02%
17 195 3.84% 139 4.01% 56 3.52%
18 177 3.49% 121 3.49% 55 3.46%
19 249 4.91% 175 5.05% 71 4.47%
20 155 3.05% 115 3.32% 40 2.52%
21 119 2.34% 75 2.16% 43 2.70%
22 151 2.98% 114 3.29% 37 2.33%
23 101 1.99% 65 1.87% 36 2.26%
24 77 1.52% 55 1.59% 22 1.38%
25 133 2.62% 90 2.60% 42 2.64%
26 124 2.44% 94 2.71% 30 1.89%
27 130 2.56% 97 2.80% 33 2.08%
28 97 1.91% 75 2.16% 22 1.38%
29 94 1.85% 71 2.05% 23 1.45%
30 143 2.82% 92 2.65% 51 3.21%
31 31 0.61% 24 0.69% 7 0.44%
Missing 160
(3.06%)
106
(2.97%)
54
(3.28%)
Total 5235 100% 3573 100% 1644 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.