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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 9.5 – 18.0 – 16.7 –
Less than 50 miles 16.8 3.2 24.2 6.7 29.9 1.4
50 to 99 miles 20.2 1.1 33.9 1.6 31.0 0.9
100 to 249 miles 10.4 1.6 21.3 1.8 22.1 1.0
250 to 499 miles 15.3 2.1 26.9 3.0 26.2 4.4
500 to 749 miles 13.6 1.1 15.5 2.0 16.1 3.9
750 to 999 miles 23.6 1.5 28.3 1.3 26.6 1.8
1,000 to 1,499 miles 12.7 1.8 23.8 1.2 23.0 1.9
1,500 to 1,999 miles 37.1 0.6 S S S S
2,000 miles or more S S 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 11.5 – 17.7 – 15.1 –
Less than 50 miles 18.1 3.1 24.2 6.6 26.3 1.1
50 to 99 miles 23.8 1.1 34.0 1.9 31.0 1.0
100 to 249 miles 12.3 1.2 20.0 1.8 21.7 1.1
250 to 499 miles 16.2 1.8 22.6 3.0 22.9 4.1
500 to 749 miles 14.3 0.8 13.3 1.8 15.0 4.1
750 to 999 miles 24.0 1.9 28.8 1.4 27.0 2.0
1,000 to 1,499 miles 12.6 2.2 20.5 1.1 19.7 1.7
1,500 to 1,999 miles 39.7 0.6 S S S S
2,000 miles or more S S 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 9.9 – 14.3 – 18.0 –
Less than 50 miles 15.5 2.8 19.1 6.5 28.1 1.8
50 to 99 miles 23.8 1.3 34.0 2.0 31.0 1.5
100 to 249 miles 11.7 1.4 19.9 2.9 20.7 1.9
250 to 499 miles 16.6 2.0 27.0 2.4 26.6 4.2
500 to 749 miles 19.1 1.3 23.3 1.0 23.6 2.5
750 to 999 miles 23.6 2.0 32.1 2.3 29.7 3.3
1,000 to 1,499 miles 13.8 2.4 29.4 2.0 28.6 3.8
1,500 to 1,999 miles 33.4 0.4 S S S S
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 38.4 – 43.8 – 35.9 –
Less than 50 miles S S S S S S
50 to 99 miles – – – – – –
100 to 249 miles S S S S S S
250 to 499 miles 39.6 6.2 33.1 7.9 33.0 4.6
500 to 749 miles 44.4 2.3 42.6 2.6 41.6 3.1
750 to 999 miles S S S S S S
1,000 to 1,499 miles 41.3 1.2 48.9 1.5 45.4 2.9
1,500 to 1,999 miles S S S S S S
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 27.3 – 33.5 – 30.5 –
Less than 50 miles S S S S S S
50 to 99 miles – – – – – –
100 to 249 miles S S 43.7 – 45.6 –
250 to 499 miles 41.8 5.9 S S S S
500 to 749 miles 38.6 13.1 S S 33.4 17.3
750 to 999 miles 44.7 1.0 S S S S
1,000 to 1,499 miles 37.4 2.7 S S S S
1,500 to 1,999 miles 47.7 1.1 33.9 – 34.2 –
2,000 miles or more S S 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 26.6 – 49.9 – S S
Less than 50 miles 47.6 5.8 45.5 8.1 30.8 0.9
50 to 99 miles S S 25.1 2.9 25.4 1.3
100 to 249 miles 37.6 4.1 44.6 6.5 47.0 3.7
250 to 499 miles 23.7 7.3 S S S S
500 to 749 miles 23.1 2.7 S S S S
750 to 999 miles 38.6 1.7 S S S S
1,000 to 1,499 miles 22.0 2.1 S S S S
1,500 to 1,999 miles S S S S S S
2,000 miles or more S S 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 29.4 – 34.9 – 43.1 –
Less than 50 miles 48.3 5.7 27.7 4.6 30.7 0.8
50 to 99 miles S S 25.1 2.0 25.4 1.1
100 to 249 miles 37.6 3.8 45.4 3.6 S S
250 to 499 miles 24.6 7.5 28.5 4.4 26.0 5.5
500 to 749 miles 27.1 3.5 44.0 2.7 47.1 2.8
750 to 999 miles 38.6 1.8 S S S S
1,000 to 1,499 miles 25.0 1.6 41.1 5.2 40.7 7.8
1,500 to 1,999 miles S S S S 49.3 0.9
2,000 miles or more S S S S S S

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 S S S S S S
Less than 50 miles S S S S S S
50 to 99 miles – – – – – –
100 to 249 miles S S S S S S
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles – – – – – –
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles S S S S S S
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 35.4 – S S S S
Less than 50 miles S S S S S S
50 to 99 miles S S 48.5 3.7 48.3 5.8
100 to 249 miles S S S S S S
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles S S S S S S
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles – – – – – –
2,000 miles or more – – – – – –

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.