Table B-3. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Distance Shipped for CBSA of Origin: 2002

Table B-3. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Distance Shipped for CBSA of Origin: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

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All modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 11.2 19.2 S S
Less than 50 miles 11.7 4.1 15.7 2.9 13.0 7.9
50 to 99 miles 29.5 1.3 31.3 0.4 24.8 2.7
100 to 249 miles 30.1 3.1 28.5 1.1 22.5 10.6
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 24.1 0.7 S S S S

Single modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.5 16.5 27.9
Less than 50 miles 14.5 5.4 17.0 1.4 13.3 10.9
50 to 99 miles 49.4 1.6 45.8 0.4 47.1 1.3
100 to 249 miles 49.4 4.0 42.5 1.0 41.1 3.5
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 39.3 0.6 S S S S

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.5 19.4 12.2
Less than 50 miles 14.5 19.4 12.2
50 to 99 miles
100 to 249 miles
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances
Less than 50 miles
50 to 99 miles
100 to 249 miles
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more

All other Single modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 27.1 20.2 35.6
Less than 50 miles 22.3 9.6 20.5 14.3 24.6 10.2
50 to 99 miles 49.4 2.6 45.8 3.2 47.1 1.4
100 to 249 miles 49.4 7.5 42.5 9.7 41.1 6.0
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 39.3 4.8 S S S S

Multiple modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 15.2 49.2 S S
Less than 50 miles 35.7 5.8 S S S S
50 to 99 miles 17.1 3.2 37.9 7.4 31.6 4.5
100 to 249 miles 14.1 3.8 35.1 10.2 26.5 19.1
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 34.8 3.9 S S S S

Parcel, USPS or courier

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 31.9 21.0 26.5
Less than 50 miles 48.2 7.5 34.3 7.4 25.8 0.6
50 to 99 miles 28.8 3.8 22.5 1.9 23.1 0.8
100 to 249 miles 22.8 2.6 19.7 4.5 18.4 2.2
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 25.8 5.9 25.8 2.4 29.4 2.9

All other multiple modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 16.1 49.6 S S
Less than 50 miles 43.7 5.1 S S S S
50 to 99 miles 21.5 5.5 38.4 7.7 32.2 4.9
100 to 249 miles 17.7 3.9 35.3 10.6 26.6 19.8
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more S S S S S S

Other and unknown modes

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 23.0 40.4 37.8
Less than 50 miles 25.1 4.0 44.8 8.8 35.4 12.0
50 to 99 miles S S S S S S
100 to 249 miles 32.9 1.8 S S 47.7 11.3
250 to 499 miles
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more S S S S S S

KEY:
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information onf 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, Metropolitan Data, December 2004.