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 16.6 18.8 23.6
Less than 50 miles 12.8 3.6 14.7 4.0 30.8 0.7
50 to 99 miles 20.5 0.7 36.3 0.8 31.8 0.2
100 to 249 miles 29.3 3.3 32.2 3.6 33.7 3.4
250 to 499 miles 19.9 2.7 31.5 2.7 34.6 3.8
500 to 749 miles 46.8 7.0 26.7 2.5 26.9 5.2
750 to 999 miles 30.4 2.4 33.5 0.9 33.7 3.1
1,000 to 1,499 miles 19.0 1.3 21.9 0.7 23.0 3.5
1,500 to 1,999 miles 31.6 0.8 33.2 35.0 0.3
2,000 miles or more 40.7 0.5 41.3 43.9 0.4

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 19.3 19.2 24.6
Less than 50 miles 13.2 4.8 14.8 4.2 30.9 0.7
50 to 99 miles 21.8 0.9 36.6 0.8 32.0 0.2
100 to 249 miles 33.1 3.5 32.4 3.6 33.9 3.6
250 to 499 miles 21.0 3.5 31.8 2.7 34.9 3.8
500 to 749 miles 49.9 7.8 26.9 2.5 27.2 5.3
750 to 999 miles 36.3 2.7 33.7 0.9 33.9 3.2
1,000 to 1,499 miles 29.6 1.6 26.1 0.4 28.0 2.5
1,500 to 1,999 miles 38.8 0.9 35.8 37.6 0.3
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 18.2 25.4 39.0
Less than 50 miles 13.1 5.0 14.2 5.0 20.0 1.0
50 to 99 miles 21.9 0.9 37.8 1.0 33.2 0.6
100 to 249 miles 34.0 3.6 45.7 3.1 48.8 2.9
250 to 499 miles 21.5 3.5 46.2 2.3 S S
500 to 749 miles 32.3 1.5 42.4 1.2 43.6 3.0
750 to 999 miles S S 39.7 0.7 41.5 2.8
1,000 to 1,499 miles 26.4 0.7 15.6 0.5 15.7 3.6
1,500 to 1,999 miles 46.6 0.3 33.0 32.5 0.2
2,000 miles or more

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 45.1 25.3 19.7
Less than 50 miles S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles 42.6 6.5 S S S S
250 to 499 miles 27.7 7.4 40.8 6.7 34.4 7.2
500 to 749 miles S S 34.5 8.9 33.6 8.2
750 to 999 miles 43.8 5.4 45.6 7.4 45.9 7.5
1,000 to 1,499 miles 41.9 6.5 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 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 41.2 8.7 S S S S
500 to 749 miles 43.3 11.6 S S S S
750 to 999 miles S S S S S S
1,000 to 1,499 miles 47.7 9.7 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 17.1 18.9 21.2
Less than 50 miles 33.3 2.8 S S 36.8
50 to 99 miles 29.1 0.8 32.4 1.2 33.2 0.2
100 to 249 miles 38.0 3.5 26.0 5.8 24.1 3.8
250 to 499 miles 23.6 3.1 29.6 3.2 30.8 3.1
500 to 749 miles 22.1 2.7 29.6 2.8 31.2 2.4
750 to 999 miles 28.0 1.4 46.3 1.8 47.5 3.8
1,000 to 1,499 miles 22.8 2.6 30.2 3.4 30.8 7.4
1,500 to 1,999 miles S S S S S S
2,000 miles or more 40.8 5.0 41.4 7.3 44.0 15.4

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 19.6 22.1 24.4
Less than 50 miles 34.5 2.7 24.5 1.2 14.5
50 to 99 miles 29.1 0.9 32.4 1.6 33.2 0.3
100 to 249 miles 38.1 3.5 30.0 6.1 29.2 3.8
250 to 499 miles 23.6 3.6 32.0 3.7 33.1 3.1
500 to 749 miles 23.7 3.2 27.8 2.2 28.0 1.6
750 to 999 miles 28.0 1.9 46.3 2.5 47.5 4.0
1,000 to 1,499 miles 22.8 2.7 30.2 3.6 30.8 5.0
1,500 to 1,999 miles S S 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 47.3 40.3 44.2
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 S S S S
500 to 749 miles S S S S S S
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 41.2 12.1 41.7 10.7 44.5 14.0

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 47.6 40.4 S S
Less than 50 miles 43.8 14.2 35.0 14.4 36.7 14.6
50 to 99 miles S S S S S S
100 to 249 miles S S 49.5 6.9 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.