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Table 6.19 2003 NSDUH CAI Audit Trail Timing Data: Market Information for Marijuana
Section
Age Category 12-17 18 +
Year of Interest 2001 2002 2003 2001 2002 2003
Sample Size 1,127 3,626 3,321 2,426 8,592 8,258
Summary Statistics (Minutes)
Mean (F) 1.6 1.6 1.6 1.5 1.6 1.6
Variance (σ 2 ) 0.6 0.5 0.5 0.9 0.6 0.7
Standard Deviation (σ) 0.8 0.7 0.7 1.0 0.8 0.8
Quartiles
Maximum 8.7 6.3 7.5 12.5 14.8 17.8
Q3 2.0 1.9 1.9 1.9 1.9 1.9
Median 1.5 1.5 1.5 1.4 1.5 1.4
Q1 1.1 1.1 1.1 1.0 1.0 1.0
Minimum 0.0 0.0 0.0 0.0 0.0 0.0
Range 8.7 6.3 7.5 12.5 14.8 17.8
Mode 1.1 1.1 1.1 0.8 1.0 1.0
Percentiles
Extremes
99% 4.2 3.7 3.6 4.9 3.9 4.1
95% 2.9 2.7 2.8 2.9 2.8 2.9
90% 2.5 2.4 2.4 2.5 2.5 2.4
10% 0.8 0.9 0.8 0.7 0.8 0.8
5% 0.7 0.7 0.7 0.6 0.7 0.7
1% 0.3 0.4 0.3 0.3 0.5 0.4
5 Highest Values (Highest) 8.7 6.3 7.5 12.5 14.8 17.8
5.5 6.2 6.3 12.4 11.6 15.6
5.3 6.1 5.7 11.7 10.6 13.1
5.3 6.0 5.1 10.9 10.6 13.1
4.8 5.9 5.0 10.7 10.2 12.5
5 Lowest Values 0.1 0.0 0.0 0.0 0.1 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
(Lowest) 0.0 0.0 0.0 0.0 0.0 0.0
Note: Time recording begins at MJE01 and stops recording after MJE70 in the Market Information for Marijuana
Module.
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