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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 20.4 – 31.3 – 9.1 –
Less than 50 miles 22.3 2.3 39.2 5.0 28.1 1.7
50 to 99 miles 14.4 0.7 26.2 1.4 26.8 0.8
100 to 249 miles 7.5 2.2 18.9 1.4 18.0 2.3
250 to 499 miles 10.8 0.7 22.1 1.1 23.6 1.3
500 to 749 miles 21.4 1.0 17.7 0.5 17.7 0.6
750 to 999 miles S S 26.7 1.4 25.0 2.3
1,000 to 1,499 miles 24.6 0.6 21.8 0.3 19.8 1.2
1,500 to 1,999 miles 10.8 1.2 8.3 0.5 8.6 2.6
2,000 miles or more 34.1 1.1 22.1 0.7 22.4 4.4

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 24.2 – 31.9 – 7.5 –
Less than 50 miles 25.7 2.1 39.6 4.8 28.5 1.8
50 to 99 miles 16.8 0.8 26.4 1.5 27.0 0.9
100 to 249 miles 6.9 2.5 19.3 1.5 18.3 2.4
250 to 499 miles 12.5 0.9 20.5 1.1 21.9 1.6
500 to 749 miles 27.9 1.2 19.2 0.6 19.4 0.8
750 to 999 miles S S 28.0 1.5 26.4 3.0
1,000 to 1,499 miles 22.2 0.4 26.8 0.3 24.9 1.5
1,500 to 1,999 miles 16.8 1.4 12.5 0.4 12.7 2.6
2,000 miles or more 42.7 1.3 24.6 0.7 24.6 4.9

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 – 34.7 – 12.9 –
Less than 50 miles 26.6 2.5 42.0 5.0 33.3 2.5
50 to 99 miles 17.0 0.9 26.5 1.5 27.1 1.2
100 to 249 miles 7.7 2.4 20.7 1.6 20.0 3.6
250 to 499 miles 12.8 0.9 19.6 1.0 21.4 1.2
500 to 749 miles 14.8 0.7 23.5 0.7 24.1 1.2
750 to 999 miles S S 40.5 1.4 40.0 4.0
1,000 to 1,499 miles 28.9 0.4 33.3 0.3 31.4 1.3
1,500 to 1,999 miles 19.0 1.5 18.6 0.5 19.1 3.8
2,000 miles or more 16.5 0.9 22.7 0.3 24.7 2.8

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 25.1 – 31.9 – 17.5 –
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 S S S S
250 to 499 miles S S S S S S
500 to 749 miles 32.6 2.3 34.1 2.3 31.5 1.6
750 to 999 miles 19.9 7.6 16.1 6.6 16.2 6.6
1,000 to 1,499 miles 38.8 2.0 32.4 1.7 31.0 2.7
1,500 to 1,999 miles 29.3 5.9 29.3 4.8 29.1 4.9
2,000 miles or more S S 45.0 4.5 45.3 6.8

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 45.6 – 22.2 – S S
Less than 50 miles S S 28.2 13.1 42.4 12.4
50 to 99 miles S S S S S S
100 to 249 miles S S 46.5 0.4 43.8 0.3
250 to 499 miles S S 39.4 2.7 S S
500 to 749 miles S S 35.9 0.4 40.7 2.5
750 to 999 miles 42.4 6.0 S S S S
1,000 to 1,499 miles 45.9 1.3 31.5 0.3 30.5 0.5
1,500 to 1,999 miles 48.8 3.8 39.1 3.2 38.6 6.0
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 8.4 – 23.0 – 26.7 –
Less than 50 miles 26.1 4.0 29.5 1.6 37.8 –
50 to 99 miles 32.5 1.0 40.1 0.3 35.6 –
100 to 249 miles 21.5 4.3 29.9 2.4 29.9 0.4
250 to 499 miles 17.7 1.7 31.8 1.3 32.3 0.4
500 to 749 miles 24.7 3.2 31.2 1.9 30.8 1.4
750 to 999 miles 20.8 1.5 46.8 4.5 45.2 3.8
1,000 to 1,499 miles 24.3 1.0 S S S S
1,500 to 1,999 miles 15.3 1.7 27.5 4.2 28.6 6.8
2,000 miles or more 22.2 3.3 38.2 5.7 38.5 6.7

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 7.9 – 15.2 – 13.7 –
Less than 50 miles 26.2 4.2 28.4 2.7 27.3 –
50 to 99 miles 32.5 1.2 40.1 1.4 35.6 0.1
100 to 249 miles 21.8 4.4 17.2 4.3 16.8 0.9
250 to 499 miles 18.4 1.8 32.4 1.9 29.8 0.7
500 to 749 miles 26.0 3.2 15.1 1.3 16.2 1.1
750 to 999 miles 21.4 1.6 21.8 1.5 21.7 1.5
1,000 to 1,499 miles 24.9 1.0 40.1 1.8 41.1 2.6
1,500 to 1,999 miles 18.3 1.8 17.6 1.7 17.9 3.7
2,000 miles or more 23.9 3.7 22.0 2.7 22.2 5.5

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 29.5 – 25.1 – 28.5 –
Less than 50 miles S S S S S S
50 to 99 miles – – – – – –
100 to 249 miles S S 46.8 2.2 47.3 0.4
250 to 499 miles S S S S S S
500 to 749 miles 41.6 2.2 39.6 2.5 37.6 1.6
750 to 999 miles S S S S 48.7 4.4
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 27.4 8.8 28.6 9.0 29.7 10.5
2,000 miles or more 44.9 7.0 41.7 7.6 42.1 8.8

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 40.6 – 27.1 – S S
Less than 50 miles S S 32.3 12.6 S S
50 to 99 miles S S S S S S
100 to 249 miles 31.7 6.7 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 47.4 4.3 S S S S
2,000 miles or more 35.1 1.4 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.