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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 3.0 – 9.0 – 21.0 –
Less than 50 miles 7.0 2.2 11.6 3.5 14.2 0.7
50 to 99 miles 8.5 0.9 14.1 1.5 16.9 0.8
100 to 249 miles 6.5 1.5 20.5 3.7 21.4 5.3
250 to 499 miles 8.7 1.9 15.0 3.8 19.2 5.8
500 to 749 miles 13.6 0.7 46.7 3.7 S S
750 to 999 miles 15.4 0.4 38.1 0.6 46.4 2.3
1,000 to 1,499 miles 23.0 1.1 26.5 0.6 29.6 2.5
1,500 to 1,999 miles S S 32.5 – 31.8 0.5
2,000 miles or more 30.4 0.9 14.4 – 14.3 0.7

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 4.4 – 9.3 – 21.2 –
Less than 50 miles 7.9 2.9 10.4 3.0 15.2 0.7
50 to 99 miles 9.1 1.3 13.9 1.6 16.5 1.1
100 to 249 miles 9.4 1.9 20.7 3.8 21.5 6.0
250 to 499 miles 12.4 2.4 15.1 3.8 20.3 6.1
500 to 749 miles 15.5 0.9 S S S S
750 to 999 miles 20.5 0.5 40.6 0.6 49.1 2.4
1,000 to 1,499 miles 27.8 1.0 30.1 0.6 32.7 2.5
1,500 to 1,999 miles S S 34.8 – 34.1 0.6
2,000 miles or more 43.6 0.9 13.5 – 13.4 0.7

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 4.8 – 9.7 – 9.9 –
Less than 50 miles 8.3 3.3 11.2 2.9 18.3 1.1
50 to 99 miles 9.5 1.5 20.3 1.6 20.9 1.1
100 to 249 miles 9.9 1.7 24.3 2.6 23.8 2.7
250 to 499 miles 13.0 2.5 9.8 1.1 10.1 2.4
500 to 749 miles 16.4 0.8 31.4 0.7 31.8 2.1
750 to 999 miles 23.3 0.5 24.0 0.4 24.1 1.7
1,000 to 1,499 miles 32.0 1.1 21.7 0.2 21.4 1.8
1,500 to 1,999 miles S S 35.9 0.2 35.2 1.5
2,000 miles or more 44.5 1.0 17.7 0.1 17.7 1.2

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.0 – 25.1 – 35.1 –
Less than 50 miles 24.5 6.7 42.3 9.2 32.7 2.7
50 to 99 miles 43.9 1.2 43.2 2.7 43.9 1.6
100 to 249 miles 28.4 8.7 28.0 9.4 27.7 9.7
250 to 499 miles 23.3 6.8 31.1 9.8 35.7 8.4
500 to 749 miles S S S S S S
750 to 999 miles 30.1 0.6 S S S S
1,000 to 1,499 miles 29.1 2.3 45.8 1.9 46.5 6.2
1,500 to 1,999 miles S S S S S S
2,000 miles or more 49.0 0.4 42.1 0.4 42.0 2.2

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 49.1 – S S S S
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles 39.8 2.5 S S S S
250 to 499 miles 34.1 11.7 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 29.8 12.0 43.5 14.7 43.8 17.4
1,500 to 1,999 miles S S S S S S
2,000 miles or more 38.7 2.2 47.3 0.6 48.3 1.3

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 19.5 – S S 49.5 –
Less than 50 miles 32.7 2.9 19.6 1.8 22.6 –
50 to 99 miles 32.1 1.3 45.3 1.7 45.7 0.2
100 to 249 miles 22.1 2.4 47.5 3.9 48.1 2.0
250 to 499 miles 20.0 4.6 S S S S
500 to 749 miles 26.6 1.7 S S S S
750 to 999 miles 40.7 1.0 S S S S
1,000 to 1,499 miles 42.8 4.6 45.7 5.9 41.8 8.7
1,500 to 1,999 miles 36.9 0.6 S S S S
2,000 miles or more 31.2 1.5 34.7 6.4 33.7 10.2

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 20.0 – S S S S
Less than 50 miles 32.7 3.0 19.6 2.5 22.6 0.3
50 to 99 miles 32.1 1.3 45.3 2.3 45.7 0.7
100 to 249 miles 22.1 2.5 47.5 3.4 48.1 3.0
250 to 499 miles 20.4 4.9 S S S S
500 to 749 miles 28.1 1.6 34.1 1.1 33.2 1.9
750 to 999 miles 41.6 1.0 S S S S
1,000 to 1,499 miles 43.6 4.6 S S S S
1,500 to 1,999 miles 36.9 0.6 S S S S
2,000 miles or more 32.9 1.4 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 34.4 – S S S S
Less than 50 miles – – – – – –
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 – – – – – –
2,000 miles or more 49.2 10.4 S S 49.9 13.9

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 32.0 – S S S S
Less than 50 miles 19.3 12.3 S S S S
50 to 99 miles 39.9 2.2 S S S S
100 to 249 miles S S S S S S
250 to 499 miles S S 44.8 8.6 45.9 12.2
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 – – – – – –

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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