BTS | Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997

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BTS Home > Publications > Commodity Flow Survey > Hazardous Materials

Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]

Excel | CSV

Country	Value - CV		Value - Std. error of percent	Tons - CV		Tons - Std. error of percent
Country	2002	1997	Value - Std. error of percent	2002	1997	Tons - Std. error of percent
Total	16.2	35.7	32.9	24.9	28.5	35.4
Canada	19.9	43.7	32.1	26.1	35.7	26.7
Mexico	28.5	43.3	32.0	29.9	S	S
All Others	20.3	35.8	40.1	39.0	36.6	90.9

KEY:
– Represents an estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because 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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