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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.) 13.40 (8.51) 13.72 (8.68) 12.56 (7.99)
0 2 0.04% 2 0.06% 0 0.00%
1 234 5.03% 184 5.45% 50 3.92%
2 241 5.18% 158 4.68% 82 6.43%
3 199 4.27% 138 4.09% 60 4.70%
4 183 3.93% 131 3.88% 52 4.08%
5 119 2.56% 91 2.70% 28 2.19%
6 175 3.76% 122 3.62% 53 4.15%
7 124 2.66% 88 2.61% 36 2.82%
8 159 3.41% 109 3.23% 49 3.84%
9 355 7.62% 252 7.47% 103 8.07%
10 290 6.23% 199 5.90% 91 7.13%
11 207 4.45% 143 4.24% 64 5.02%
12 140 3.01% 96 2.85% 44 3.45%
13 239 5.13% 161 4.77% 77 6.03%
14 126 2.71% 78 2.31% 48 3.76%
15 128 2.75% 94 2.79% 34 2.66%
16 120 2.58% 81 2.40% 39 3.06%
17 150 3.22% 119 3.53% 31 2.43%
18 137 2.94% 100 2.96% 37 2.90%
19 171 3.67% 115 3.41% 56 4.39%
20 79 1.70% 61 1.81% 18 1.41%
21 83 1.78% 70 2.07% 13 1.02%
22 72 1.55% 58 1.72% 13 1.02%
23 107 2.30% 82 2.43% 25 1.96%
24 77 1.65% 59 1.75% 18 1.41%
25 135 2.90% 104 3.08% 31 2.43%
26 138 2.96% 113 3.35% 25 1.96%
27 129 2.77% 99 2.93% 30 2.35%
28 93 2.00% 81 2.40% 12 0.94%
29 89 1.91% 66 1.96% 22 1.72%
30 129 2.77% 99 2.93% 30 2.35%
31 26 0.56% 21 0.62% 5 0.39%
Missing 80
(1.69%)
46
(1.35%)
34
(2.60%)
Total 4736 100% 3420 100% 1310 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.