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Table B-2a. Estimated Measures of Reliability for Hazardous Material
Shipment Characteristics by Hazard Class: 2002
[Estimates are shown as percents and are based on data from the
2002 Commodity Flow Survey]
Excel | CSV
| Total |
3.0 |
– |
4.2 |
– |
4.4 |
– |
7.1 |
| Class 1, Explosives |
23.8 |
0.3 |
43.2 |
– |
29.5 |
0.1 |
10.9 |
| Class 2, Gases |
7.9 |
0.8 |
15.6 |
1.1 |
8.9 |
0.9 |
29.0 |
| Class 3, Flammable
liquids |
3.7 |
1.4 |
4.3 |
1.4 |
5.2 |
1.6 |
12.2 |
| Class 4, Flammable solids |
22.1 |
0.2 |
8.8 |
– |
14.0 |
0.2 |
46.3 |
| Class 5, Oxidizers and
organic peroxides |
21.8 |
0.2 |
26.8 |
0.2 |
25.3 |
0.3 |
18.7 |
| Class 6, Toxic (poison) |
11.6 |
0.2 |
15.9 |
– |
22.2 |
0.3 |
21.3 |
| Class 7, Radioactive
materials |
39.0 |
0.3 |
31.2 |
– |
31.7 |
– |
S |
| Class 8, Corrosive
materials |
6.9 |
0.5 |
9.7 |
0.6 |
10.1 |
1.1 |
14.9 |
| Class 9, Miscellaneous
dangerous goods |
13.4 |
0.5 |
20.6 |
0.6 |
11.8 |
0.7 |
9.3 |
KEY:
– Represents and estimate equal to zero or less than 1 unit of
measure.
S Estimate does not meet publication standards b ecause of highly sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give
information on confidentiality protection, sampling error, nonsampling error,
sample design, and definitions. Links to this information on the Internet may
be found at www.census.gov/cfs.
SOURCE:
Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau,
2002 Commodity Flow Survey, Hazmat Data, December 2004.
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