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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.) 13.68 (8.64) 13.96 (8.70) 13.08 (8.48)
0 1 0.03% 0 0.00% 1 0.10%
1 177 5.48% 107 4.80% 69 6.96%
2 167 5.17% 116 5.21% 48 4.84%
3 141 4.36% 99 4.45% 41 4.13%
4 160 4.95% 107 4.80% 53 5.34%
5 95 2.94% 73 3.28% 22 2.22%
6 88 2.72% 63 2.83% 25 2.52%
7 90 2.78% 58 2.60% 32 3.23%
8 104 3.22% 65 2.92% 38 3.83%
9 215 6.65% 142 6.38% 73 7.36%
10 153 4.73% 102 4.58% 51 5.14%
11 94 2.91% 64 2.87% 30 3.02%
12 91 2.82% 54 2.42% 37 3.73%
13 111 3.43% 68 3.05% 41 4.13%
14 89 2.75% 69 3.10% 20 2.02%
15 110 3.40% 76 3.41% 33 3.33%
16 103 3.19% 72 3.23% 31 3.12%
17 113 3.50% 86 3.86% 27 2.72%
18 107 3.31% 72 3.23% 34 3.43%
19 141 4.36% 98 4.40% 41 4.13%
20 104 3.22% 79 3.55% 25 2.52%
21 78 2.41% 47 2.11% 31 3.12%
22 86 2.66% 66 2.96% 20 2.02%
23 72 2.23% 46 2.07% 26 2.62%
24 48 1.49% 35 1.57% 13 1.31%
25 86 2.66% 59 2.65% 26 2.62%
26 82 2.54% 62 2.78% 20 2.02%
27 86 2.66% 65 2.92% 21 2.12%
28 60 1.86% 47 2.11% 13 1.31%
29 68 2.10% 52 2.33% 16 1.61%
30 85 2.63% 56 2.51% 29 2.92%
31 27 0.84% 22 0.99% 5 0.50%
Missing 84
(2.53%)
48
(2.11%)
36
(3.50%)
Total 3316 100% 2275 100% 1028 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.