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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 10.1 – 22.4 – 12.8 –
Less than 50 miles 15.0 3.7 30.8 5.8 29.4 1.3
50 to 99 miles 35.7 1.5 22.3 0.6 21.3 0.3
100 to 249 miles 30.2 3.4 20.8 2.2 20.5 1.7
250 to 499 miles 10.2 1.5 19.1 1.4 19.4 1.6
500 to 749 miles 17.0 2.4 21.8 1.6 30.7 4.0
750 to 999 miles 26.6 1.8 21.6 1.5 22.4 3.3
1,000 to 1,499 miles 16.6 2.0 12.5 0.8 12.6 3.1
1,500 to 1,999 miles 25.8 0.2 29.4 – 29.5 0.4
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 11.6 – 22.8 – 13.0 –
Less than 50 miles 16.0 4.2 31.2 5.8 29.6 1.3
50 to 99 miles 35.2 1.5 22.3 0.7 21.2 0.3
100 to 249 miles 32.3 3.9 21.0 2.3 20.6 1.7
250 to 499 miles 12.3 1.7 19.3 1.4 19.7 1.7
500 to 749 miles 19.2 2.8 22.0 1.5 31.1 4.0
750 to 999 miles 30.9 1.9 22.6 1.6 23.3 3.5
1,000 to 1,499 miles 19.8 2.1 13.0 0.8 13.1 3.2
1,500 to 1,999 miles 32.7 0.2 30.5 – 30.7 0.4
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 16.2 – 23.7 – 12.6 –
Less than 50 miles 16.0 3.4 31.2 5.4 29.7 1.9
50 to 99 miles 35.2 1.4 22.3 0.7 21.2 0.3
100 to 249 miles 32.7 3.6 22.1 2.0 21.8 1.9
250 to 499 miles 10.5 2.1 17.9 1.7 17.5 2.1
500 to 749 miles 16.4 1.4 12.2 1.1 12.3 2.5
750 to 999 miles 13.8 0.8 27.4 1.1 26.8 2.7
1,000 to 1,499 miles 12.1 1.3 16.8 0.6 16.9 2.7
1,500 to 1,999 miles 36.6 0.2 30.4 – 30.2 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 40.4 – 23.5 – 24.0 –
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 39.9 11.2 S S S S
500 to 749 miles 43.4 6.8 28.2 4.6 29.0 5.2
750 to 999 miles S S S S 49.4 8.1
1,000 to 1,499 miles 41.6 7.1 30.0 6.2 29.6 8.3
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 42.7 – S S S S
Less than 50 miles – – – – – –
50 to 99 miles – – – – – –
100 to 249 miles S S 42.2 0.7 S S
250 to 499 miles S S 45.6 6.8 43.7 5.5
500 to 749 miles 40.4 6.6 S S S S
750 to 999 miles S S 40.3 1.5 41.0 1.4
1,000 to 1,499 miles 40.4 9.1 36.1 12.0 38.0 15.3
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 13.4 – 33.2 – 31.6 –
Less than 50 miles 35.6 5.2 45.4 2.9 45.3 –
50 to 99 miles S S 28.2 1.0 28.0 0.1
100 to 249 miles 30.1 2.6 S S S S
250 to 499 miles 16.0 1.8 32.1 2.2 31.5 1.3
500 to 749 miles 21.3 2.6 29.4 5.8 28.6 5.4
750 to 999 miles 21.4 3.1 30.5 1.8 31.0 2.4
1,000 to 1,499 miles 18.7 2.8 37.9 4.3 40.9 6.7
1,500 to 1,999 miles 36.2 0.3 S S S S
2,000 miles or more 49.2 0.2 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 13.4 – 39.9 – 38.6 –
Less than 50 miles 35.6 5.3 45.4 3.7 45.3 0.2
50 to 99 miles S S 28.2 1.4 28.0 0.3
100 to 249 miles 30.3 2.6 S S S S
250 to 499 miles 16.0 1.8 32.1 2.4 31.5 2.0
500 to 749 miles 21.5 2.7 30.4 5.4 29.9 4.8
750 to 999 miles 22.4 3.1 34.4 1.6 35.1 1.5
1,000 to 1,499 miles 18.5 2.8 38.4 2.8 38.1 3.6
1,500 to 1,999 miles 36.2 0.3 S S S S
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 – – – – – –
50 to 99 miles – – – – – –
100 to 249 miles S S S S S S
250 to 499 miles – – – – – –
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 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 24.8 – 34.9 – 41.3 –
Less than 50 miles 34.1 9.4 S S 48.6 2.2
50 to 99 miles S S S S S S
100 to 249 miles S S S S S S
250 to 499 miles 34.7 4.2 40.8 6.4 39.6 9.7
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 40.8 3.5 36.3 6.0 37.6 9.8
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.