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Table 6.8 2003 NSDUH CAI Audit Trail Timing Data: Marijuana Section
Age Category 12-17 18 +
Year of Interest 2001 2002 2003 2001 2002 2003
Sample Size 7,558 22,810 21,835 15,189 42,747 43,412
Summary Statistics (Minutes)
Mean (F) 0.5 0.5 0.5 0.5 0.6 0.5
Variance (σ 2 ) 0.3 0.3 23.1 0.3 0.3 0.4
Standard Deviation (σ) 0.6 0.6 4.8 0.5 0.6 0.6
Quartiles
Maximum 10.1 11.0 706.6 17.7 29.2 45.0
Q3 0.6 0.6 0.6 0.7 0.7 0.7
Median 0.3 0.4 0.4 0.4 0.4 0.4
Q1 0.1 0.2 0.2 0.2 0.2 0.2
Minimum 0.0 0.0 0.0 0.0 0.0 0.0
Range 10.1 11.0 706.6 17.7 29.2 45.0
Mode 0.1 0.1 0.1 0.1 0.1 0.1
Percentiles
99% 2.6 2.7 2.6 2.4 2.5 2.5
95% 1.5 1.7 1.6 1.4 1.5 1.5
90% 1.1 1.2 1.2 1.0 1.2 1.1
10% 0.1 0.1 0.1 0.1 0.1 0.1
5% 0.1 0.1 0.1 0.1 0.1 0.1
1% 0.1 0.1 0.1 0.1 0.1 0.1
Extremes
5 Highest Values (Highest) 10.1 11.0 706.6 17.7 29.2 45.0
8.9 8.8 12.2 14.1 15.7 34.5
7.5 8.5 7.4 8.9 14.6 16.4
6.1 7.3 7.3 8.2 12.7 14.0
5.4 7.2 7.0 8.1 9.6 12.0
5 Lowest Values 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 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 MRJINTRO and stops recording after MJCC16 in the Marijuana Module.
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