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Table 6.32 2003 NSDUH CAI Audit Trail Timing Data: Back-End Demographics Section Among
15+ By Employment Status
Employment Status Employed Not Employed
Year of Interest 2001 2002 2003 2001 2002 2003
Sample Size 12,776 35,734 35,656 6,261 18,254 18,668
Summary Statistics (Minutes)
Mean (F) 7.2 7.6 7.8 4.5 4.8 5.1
Variance (σ 2 ) 11.9 10.3 10.7 8.6 7.8 9.1
Standard Deviation (σ) 3.4 3.2 3.3 2.9 2.8 3.0
Quartiles
Maximum 133.7 72.9 94.3 44.3 63.5 104.1
Q3 8.4 8.8 9.0 5.5 6.0 6.4
Median 6.5 7.0 7.2 3.8 4.3 4.6
Q1 5.2 5.6 5.8 2.6 2.9 3.2
Minimum 0.0 0.0 0.1 0.2 0.0 0.0
Range 133.7 72.9 94.3 44.2 63.5 104.1
Mode 6.3 6.3 6.2 2.3 3.3 3.9
Percentiles
Extremes
99% 18.7 18.9 18.7 13.9 14.0 14.5
95% 12.7 13.1 13.3 9.6 9.7 10.2
90% 10.8 11.1 11.3 7.9 8.1 8.5
10% 4.2 4.6 4.8 1.8 2.1 2.2
5% 3.6 4.0 4.2 1.5 1.7 1.8
1% 2.6 3.1 3.3 0.9 1.1 1.2
5 Highest Values (Highest) 133.7 72.9 94.3 44.3 63.5 104.1
66.2 63.5 90.2 42.0 50.7 76.3
54.8 61.9 71.9 36.2 44.4 53.0
48.0 60.9 70.5 35.8 40.6 51.2
44.5 57.4 67.0 32.3 36.7 50.9
5 Lowest Values 0.2 0.2 0.2 0.3 0.3 0.1
0.2 0.2 0.1 0.3 0.3 0.0
0.1 0.1 0.1 0.2 0.2 0.0
0.1 0.1 0.1 0.2 0.2 0.0
(Lowest) 0.0 0.0 0.1 0.2 0.0 0.0
Note: Time recording in 2003 begins at INTRODM2 and stops recording after SUPPRMC. Time recording in 2001
and 2002 began at INTRODM2 and stopped recording after MBRSELCT.
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