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Table 6.5 2003 NSDUH CAI Audit Trail Timing Data: Total Core Sections
Age Category 12-17 18 +
Year of Interest 2001 2002 2003 2001 2002 2003
Sample Size 7,563 22,818 21,843 15,208 42,771 43,439
Summary Statistics (Minutes)
Mean (F) 11.8 13.0 12.9 12.5 13.6 13.6
Variance (σ 2 ) 32.8 35.4 57.4 47.7 46.1 419.8
Standard Deviation (σ) 5.7 5.9 7.6 6.9 6.8 20.5
Quartiles
Maximum 52.7 85.7 721.8 98.0 103.4 4,048.0
Q3 15.0 16.5 16.2 15.3 16.7 16.7
Median 10.8 12.1 11.9 10.9 12.2 12.1
Q1 7.6 8.7 8.5 7.9 8.9 8.8
Minimum 0.0 0.0 0.0 0.0 0.0 0.0
Range 52.7 85.7 721.8 98.0 103.4 4,048.0
Mode 12.0 8.0 9.5 8.6 9.5 10.5
Percentiles
Extremes
99% 28.8 30.1 30.1 35.6 35.5 34.8
95% 22.6 23.7 23.6 25.8 26.6 26.5
90% 19.6 20.8 20.6 21.3 22.4 22.5
10% 5.6 6.3 6.2 5.8 6.7 6.6
5% 4.5 5.3 5.1 4.7 5.6 5.5
1% 3.0 3.4 3.4 2.9 3.6 3.7
5 Highest Values (Highest) 52.7 85.7 721.8 98.0 103.4 4,048.0
51.4 77.9 75.8 87.1 79.1 82.5
50.5 73.0 70.9 82.6 78.1 82.2
48.9 64.3 57.2 75.8 76.7 79.9
43.6 62.6 57.0 71.3 74.9 79.5
5 Lowest Values 0.1 0.0 0.0 0.1 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
(Lowest) 0.0 0.0 0.0 0.0 0.0 0.0
Note: Time recording begins at LEADCIG in the Tobacco Module and stops recording after SV13 in the Sedatives
Module.
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