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 5.3 16.0 20.0
Less than 50 miles 12.2 2.3 25.4 4.4 29.0 0.7
50 to 99 miles 10.8 2.2 20.8 4.4 20.2 1.9
100 to 249 miles 4.6 1.2 24.6 3.5 24.7 3.4
250 to 499 miles 14.4 1.5 24.8 3.5 29.4 5.0
500 to 749 miles 15.0 1.8 14.7 0.4 13.8 1.5
750 to 999 miles 16.4 0.5 34.4 0.2 31.8 0.7
1,000 to 1,499 miles 17.7 0.9 35.3 0.3 38.7 1.2
1,500 to 1,999 miles 15.8 0.9 11.1 0.2 11.7 1.7
2,000 miles or more 42.1 47.3 42.5

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 6.3 15.1 14.8
Less than 50 miles 14.8 2.5 25.3 4.5 28.9 0.8
50 to 99 miles 11.2 2.0 21.0 4.5 20.4 2.0
100 to 249 miles 5.9 1.5 24.8 3.8 25.0 3.7
250 to 499 miles 13.6 1.6 18.3 2.2 18.6 3.1
500 to 749 miles 14.7 1.5 16.8 0.4 16.0 1.5
750 to 999 miles 14.6 0.4 36.9 0.2 34.5 1.0
1,000 to 1,499 miles 20.0 0.8 35.7 0.4 37.9 1.9
1,500 to 1,999 miles 17.9 0.9 10.3 0.2 10.5 1.5
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 6.6 17.5 13.4
Less than 50 miles 14.8 2.5 26.8 5.7 28.9 1.4
50 to 99 miles 11.2 2.1 24.4 4.9 23.3 2.7
100 to 249 miles 6.5 1.7 12.3 3.0 11.1 2.4
250 to 499 miles 13.0 1.6 18.8 2.0 18.6 2.6
500 to 749 miles 16.2 1.5 20.8 0.5 20.8 1.5
750 to 999 miles 15.2 0.4 42.3 0.3 40.8 1.7
1,000 to 1,499 miles 26.5 0.8 32.3 0.6 31.2 2.2
1,500 to 1,999 miles 10.6 0.5 11.4 0.2 11.4 1.6
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 44.4 24.0 22.7
Less than 50 miles S S 41.8 0.6 38.9
50 to 99 miles S S S S 49.5 4.0
100 to 249 miles 33.7 6.1 44.0 11.6 41.3 8.9
250 to 499 miles 47.5 5.2 S S 46.9 4.5
500 to 749 miles S S 18.1 4.0 18.7 3.9
750 to 999 miles 29.2 3.2 29.0 1.2 28.1 2.5
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

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 31.1 30.3 31.1
Less than 50 miles S S 32.2 9.1 43.4 1.2
50 to 99 miles S S S S S S
100 to 249 miles 37.3 6.7 39.5 8.7 42.8 7.2
250 to 499 miles 33.9 9.8 29.1 7.4 30.3 9.3
500 to 749 miles S S 39.2 40.0 3.2
750 to 999 miles S S 38.7 38.8 0.6
1,000 to 1,499 miles 38.0 5.1 41.6 40.0 1.6
1,500 to 1,999 miles 48.3 2.0 43.3 42.7 0.2
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 20.4 36.1 39.9
Less than 50 miles 34.1 2.1 44.4 0.3 38.8
50 to 99 miles 34.9 4.3 25.6 0.2 26.3
100 to 249 miles 26.0 3.8 S S S S
250 to 499 miles 28.5 2.3 38.9 8.3 43.9 9.3
500 to 749 miles 40.6 5.0 38.0 2.7 39.5 2.9
750 to 999 miles 39.4 1.7 45.6 1.0 45.9 1.6
1,000 to 1,499 miles 40.0 3.4 45.0 1.0 S S
1,500 to 1,999 miles 21.8 3.5 33.4 0.8 34.8 2.9
2,000 miles or more S S 49.5 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 15.2 14.9 23.2
Less than 50 miles 34.1 4.4 44.4 4.6 38.9 0.6
50 to 99 miles 34.9 4.3 25.6 4.1 26.3 1.3
100 to 249 miles 27.6 3.3 15.7 1.3 22.2 1.0
250 to 499 miles 21.1 1.9 22.1 2.7 23.5 2.6
500 to 749 miles 25.7 4.3 22.1 3.5 23.3 4.0
750 to 999 miles 25.9 0.8 33.4 1.0 34.7 1.4
1,000 to 1,499 miles 42.7 2.8 34.6 1.2 35.7 1.7
1,500 to 1,999 miles 28.0 3.7 28.8 1.1 29.3 3.5
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 43.0 36.8 40.5
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 39.1 8.5 44.1 9.4
500 to 749 miles S S 42.9 2.7 43.9 2.9
750 to 999 miles S S S S S S
1,000 to 1,499 miles 47.7 6.7 48.2 1.0 S S
1,500 to 1,999 miles 35.5 8.8 38.3 0.8 39.5 2.8
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 15.3 49.5 23.1
Less than 50 miles 28.9 7.1 S S S S
50 to 99 miles 33.6 6.6 31.4 7.2 30.5 2.2
100 to 249 miles 37.8 5.0 S S S S
250 to 499 miles 49.6 8.6 46.9 4.7 45.5 5.7
500 to 749 miles 40.7 7.7 35.5 10.7 39.1 9.8
750 to 999 miles 48.8 0.9 S S S S
1,000 to 1,499 miles 28.4 0.5 35.8 1.3 34.6 4.1
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.