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 7.9 12.3 9.3
Less than 50 miles 15.6 4.6 18.3 5.6 26.7 4.3
50 to 99 miles 16.0 1.3 23.4 1.4 21.3 0.4
100 to 249 miles 41.8 4.4 27.1 2.5 23.9 1.6
250 to 499 miles 16.0 2.0 24.0 2.2 23.8 4.3
500 to 749 miles 15.8 1.5 13.2 1.1 12.1 4.3
750 to 999 miles 19.0 1.0 30.8 0.3 38.5 3.3
1,000 to 1,499 miles 23.3 0.7 42.7 0.4 48.1 3.3
1,500 to 1,999 miles 23.6 0.3 48.9 0.2 S S
2,000 miles or more 33.7 0.1 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 7.5 12.2 8.5
Less than 50 miles 15.5 4.5 18.3 5.6 26.7 4.6
50 to 99 miles 16.9 1.4 23.4 1.4 21.4 0.5
100 to 249 miles 35.1 3.8 27.2 2.5 23.9 1.7
250 to 499 miles 16.3 2.1 24.1 2.2 23.8 4.4
500 to 749 miles 16.5 1.5 13.6 1.1 12.6 4.8
750 to 999 miles 23.4 1.0 19.7 0.2 21.7 1.6
1,000 to 1,499 miles 26.4 0.6 S S S S
1,500 to 1,999 miles 24.6 0.2 S S S S
2,000 miles or more 30.7 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 10.6 36.4 20.2
Less than 50 miles 20.2 6.1 45.3 7.3 S S
50 to 99 miles 25.0 2.2 21.3 3.1 21.7 2.7
100 to 249 miles S S 28.0 2.7 33.1 3.2
250 to 499 miles 17.0 2.0 13.2 1.5 12.9 2.6
500 to 749 miles 22.0 2.2 28.8 1.1 29.1 4.2
750 to 999 miles 31.1 1.2 20.7 0.3 20.6 1.6
1,000 to 1,499 miles 36.8 1.6 28.5 0.4 27.4 2.0
1,500 to 1,999 miles 37.2 0.6 32.7 0.2 32.7 1.3
2,000 miles or more 38.6 0.2 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 25.1 14.4 20.3
Less than 50 miles 35.8 0.8 35.1 1.4 42.8
50 to 99 miles 43.1 0.7 47.1 0.8 S S
100 to 249 miles S S 38.1 2.6 35.1 0.9
250 to 499 miles 27.0 8.6 25.4 7.6 26.6 6.4
500 to 749 miles 31.8 5.5 20.3 4.5 20.5 5.1
750 to 999 miles 47.7 4.9 26.2 4.5 27.2 5.6
1,000 to 1,499 miles 23.5 1.5 26.9 1.3 27.2 2.8
1,500 to 1,999 miles 32.8 1.3 39.8 1.5 40.4 3.5
2,000 miles or more S S S S S S

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 10.3 13.9 10.7
Less than 50 miles 18.1 6.1 21.5 6.9 30.2 5.5
50 to 99 miles 35.5 2.3 35.2 2.1 35.6 0.7
100 to 249 miles 34.5 4.1 32.4 3.8 30.0 2.6
250 to 499 miles 23.8 2.5 26.4 2.6 25.8 6.4
500 to 749 miles 20.2 1.6 17.4 1.3 16.3 6.5
750 to 999 miles 37.0 0.3 36.3 0.2 35.7 1.5
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 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 21.9 S S S S
Less than 50 miles 24.4 2.4 S S S S
50 to 99 miles 39.9 3.1 S S S S
100 to 249 miles 34.5 3.6 S S S S
250 to 499 miles 42.1 5.6 S S S S
500 to 749 miles 41.1 2.5 S S S S
750 to 999 miles 41.3 7.5 S S S S
1,000 to 1,499 miles 35.0 2.6 S S S S
1,500 to 1,999 miles S S 41.6 1.0 40.6 2.3
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 26.0 24.3 31.3
Less than 50 miles 25.0 8.2 29.8 8.1 37.2 1.6
50 to 99 miles 41.7 3.1 S S S S
100 to 249 miles 35.1 3.8 32.7 2.3 33.5 3.0
250 to 499 miles 36.2 5.7 48.6 4.9 S S
500 to 749 miles 42.4 1.9 43.7 2.6 43.5 2.7
750 to 999 miles 37.3 2.2 36.6 3.9 37.1 6.2
1,000 to 1,499 miles 44.0 2.3 40.2 2.0 39.9 3.4
1,500 to 1,999 miles S S 41.6 1.8 40.6 5.7
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 48.7 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 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 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 S S 38.0 S S
Less than 50 miles 40.5 15.4 32.7 10.6 38.5 19.4
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 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.