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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 8.3 – 17.7 – 17.4 –
Less than 50 miles 9.7 2.6 14.5 5.2 15.7 0.8
50 to 99 miles 10.4 0.4 25.8 1.0 26.9 0.3
100 to 249 miles 14.1 2.2 49.3 5.2 S S
250 to 499 miles 14.9 1.6 39.3 3.5 38.3 4.8
500 to 749 miles 16.2 1.1 18.5 1.1 18.9 1.5
750 to 999 miles 17.3 1.5 12.7 1.2 12.6 2.5
1,000 to 1,499 miles 28.1 2.8 31.1 2.3 31.1 5.4
1,500 to 1,999 miles 21.4 0.4 16.8 – 16.3 0.5
2,000 miles or more 34.4 – 42.3 – 40.4 0.2

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 7.9 – 18.4 – 18.5 –
Less than 50 miles 11.2 2.3 14.5 5.4 15.7 0.9
50 to 99 miles 12.2 0.5 26.3 1.1 27.4 0.4
100 to 249 miles 14.6 2.1 S S S S
250 to 499 miles 19.2 1.9 39.9 3.5 39.0 4.8
500 to 749 miles 13.2 0.6 20.5 1.2 20.7 1.7
750 to 999 miles 12.8 1.3 11.4 1.1 11.2 2.8
1,000 to 1,499 miles 29.0 2.9 33.4 2.4 33.5 5.8
1,500 to 1,999 miles 24.0 0.4 17.9 – 17.0 0.5
2,000 miles or more 41.5 – 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 7.6 – 13.1 – 15.8 –
Less than 50 miles 11.2 2.0 14.4 4.6 15.5 0.9
50 to 99 miles 12.2 0.6 26.6 1.5 27.7 0.8
100 to 249 miles 14.5 2.1 34.3 3.3 33.0 2.5
250 to 499 miles 19.8 1.9 31.5 1.8 33.6 3.0
500 to 749 miles 14.6 0.7 21.5 1.3 21.6 2.1
750 to 999 miles 13.2 1.4 11.6 1.0 11.5 2.5
1,000 to 1,499 miles 17.2 1.9 37.9 2.2 38.2 5.5
1,500 to 1,999 miles 29.3 0.3 18.5 – 17.7 0.4
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 47.1 – S S 49.0 –
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles 46.9 9.4 S S S S
250 to 499 miles S S S S S S
500 to 749 miles 47.9 6.0 S S S S
750 to 999 miles 45.6 6.5 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 – – – – – –

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 33.0 – 37.4 – 28.1 –
Less than 50 miles – – – – – –
50 to 99 miles S S S S S S
100 to 249 miles 38.3 3.4 35.3 4.8 35.2 1.1
250 to 499 miles S S 44.2 19.0 43.1 11.3
500 to 749 miles 43.4 4.9 S S S S
750 to 999 miles S S S S S S
1,000 to 1,499 miles S S 43.4 10.8 41.7 9.5
1,500 to 1,999 miles S S S S S S
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 20.2 – 20.2 – 23.7 –
Less than 50 miles 14.9 2.3 31.9 5.0 18.8 –
50 to 99 miles 32.4 1.0 20.4 0.2 20.2 –
100 to 249 miles 10.8 2.8 27.9 4.4 32.5 1.8
250 to 499 miles 22.6 0.9 23.7 1.2 22.8 0.5
500 to 749 miles 23.8 1.7 43.7 2.4 44.6 1.9
750 to 999 miles 24.4 2.7 48.8 6.1 S S
1,000 to 1,499 miles 33.7 3.0 32.9 3.2 33.4 5.7
1,500 to 1,999 miles 26.8 0.8 26.5 0.5 25.6 1.6
2,000 miles or more 41.3 0.2 45.1 0.9 41.9 3.8

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 20.6 – 19.6 – 20.0 –
Less than 50 miles 14.9 2.3 20.2 4.1 18.1 0.1
50 to 99 miles 32.4 1.0 20.4 0.4 20.2 –
100 to 249 miles 11.2 2.7 20.9 1.6 21.5 0.7
250 to 499 miles 22.9 0.9 23.9 2.1 23.0 1.8
500 to 749 miles 24.0 1.7 44.5 4.0 45.5 5.5
750 to 999 miles 25.1 2.6 27.4 2.6 28.2 2.8
1,000 to 1,499 miles 34.2 3.1 20.9 2.5 20.0 4.3
1,500 to 1,999 miles 26.8 0.8 14.6 0.4 14.2 1.2
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 27.9 – 32.6 – 33.7 –
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 46.2 12.4 S S S S
1,000 to 1,499 miles 28.4 8.9 S S 50.0 9.9
1,500 to 1,999 miles S S S S S S
2,000 miles or more 29.9 8.3 44.9 6.1 41.9 10.8

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 49.1 – 30.5 – 35.3 –
Less than 50 miles 26.8 12.5 41.5 10.8 48.4 5.3
50 to 99 miles 49.1 0.2 36.6 1.3 35.3 0.4
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 46.4 2.6 S S S S
1,000 to 1,499 miles S S 43.6 5.6 46.2 8.8
1,500 to 1,999 miles S S S S S S
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.
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