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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

[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 18.2 – 11.4 – 10.8 –
Less than 50 miles 11.2 4.1 13.6 4.3 12.2 0.8
50 to 99 miles 20.2 1.4 13.9 0.5 12.6 0.7
100 to 249 miles 23.3 2.5 31.1 3.5 26.7 3.4
250 to 499 miles 39.5 3.5 16.2 1.6 14.5 2.2
500 to 749 miles 14.7 1.9 10.9 0.9 12.3 1.8
750 to 999 miles 41.2 1.1 34.0 0.7 34.4 2.1
1,000 to 1,499 miles 16.8 0.4 15.3 0.1 15.5 1.1
1,500 to 1,999 miles 13.5 0.3 16.6 0.2 16.7 1.6
2,000 miles or more 47.5 – 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 21.2 – 11.7 – 11.1 –
Less than 50 miles 11.9 4.1 13.7 4.2 12.3 0.8
50 to 99 miles 19.5 1.3 13.7 0.5 12.4 0.7
100 to 249 miles 24.7 2.7 31.4 3.6 27.0 3.4
250 to 499 miles 44.2 3.7 16.3 1.7 14.6 2.4
500 to 749 miles 17.3 1.8 10.8 0.9 12.2 1.9
750 to 999 miles 30.8 0.7 21.6 0.4 22.1 1.2
1,000 to 1,499 miles 21.6 0.4 18.3 0.1 18.0 1.2
1,500 to 1,999 miles 19.6 0.3 18.2 0.2 18.2 1.6
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 22.3 – 11.6 – 11.9 –
Less than 50 miles 12.0 4.4 13.6 4.7 12.2 0.9
50 to 99 miles 20.3 1.4 14.4 0.6 13.5 0.7
100 to 249 miles 25.9 2.8 36.5 3.8 33.3 3.7
250 to 499 miles 46.9 4.0 18.9 1.9 16.1 2.5
500 to 749 miles 16.4 1.5 9.7 0.6 10.3 1.9
750 to 999 miles 31.5 0.8 21.9 0.4 22.4 1.3
1,000 to 1,499 miles 21.0 0.4 18.3 0.1 18.0 1.6
1,500 to 1,999 miles 25.1 0.5 22.9 0.2 23.2 1.9
2,000 miles or more S S S S S S

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 38.0 – 31.3 – 35.2 –
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles S S 43.9 3.9 43.7 8.3
250 to 499 miles 40.6 9.6 42.7 9.6 42.6 8.9
500 to 749 miles 47.5 10.2 46.2 8.1 46.9 10.5
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 32.9 10.4 35.6 10.5 35.3 11.0
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 41.8 – S S S S
Less than 50 miles – – – – – –
50 to 99 miles S S S S S S
100 to 249 miles S S S S S S
250 to 499 miles 33.5 8.8 S S S S
500 to 749 miles S S 49.9 12.0 48.7 11.1
750 to 999 miles 39.9 1.1 35.7 8.2 35.3 8.3
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles S S 47.2 4.8 47.3 8.5
2,000 miles or more 47.6 8.7 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 26.9 – 23.0 – 23.6 –
Less than 50 miles 37.0 4.3 41.8 2.4 33.4 –
50 to 99 miles 39.7 2.6 37.1 2.8 37.3 0.6
100 to 249 miles 29.8 5.0 22.7 5.8 23.1 3.4
250 to 499 miles 34.4 5.6 24.8 4.1 24.5 2.4
500 to 749 miles 29.6 3.4 29.5 3.1 30.2 2.7
750 to 999 miles S S 36.3 1.5 35.4 2.9
1,000 to 1,499 miles 42.2 0.9 S S S S
1,500 to 1,999 miles 30.4 2.0 21.3 2.3 21.3 5.2
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 27.4 – 25.1 – 28.5 –
Less than 50 miles 37.0 4.4 41.8 2.4 33.4 0.1
50 to 99 miles 39.7 2.6 37.1 3.0 37.3 0.8
100 to 249 miles 29.8 5.0 22.7 5.7 23.1 3.3
250 to 499 miles 34.5 6.2 25.7 4.8 26.0 3.3
500 to 749 miles 30.1 3.4 32.1 2.4 33.0 1.8
750 to 999 miles S S 42.3 1.4 41.1 1.7
1,000 to 1,499 miles 42.5 1.0 S S S S
1,500 to 1,999 miles 34.0 2.0 26.8 1.6 26.6 4.0
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 – – – – – –
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 S S S S S S
2,000 miles or more – – – – – –

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 29.8 – 41.2 – S S
Less than 50 miles 33.6 10.1 S S 36.3 6.2
50 to 99 miles 33.8 3.4 S S S S
100 to 249 miles 38.3 3.7 S S S S
250 to 499 miles S S 28.8 7.9 28.6 11.0
500 to 749 miles 49.3 8.5 47.3 3.8 49.8 7.2
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 S S S S S S
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.
Research and Innovative Technology Administration (RITA) • U.S. Department of Transportation (US DOT)
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