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 8.3 36.7 38.4
Less than 50 miles 23.6 5.0 49.3 7.2 44.8 3.6
50 to 99 miles 6.2 1.7 20.9 4.6 17.4 3.7
100 to 249 miles 12.2 1.2 31.0 1.1 28.8 1.9
250 to 499 miles 18.2 2.0 29.2 0.9 32.4 5.3
500 to 749 miles 19.6 0.6 14.5 0.3 14.6 1.9
750 to 999 miles 38.3 0.3 40.5 0.1 41.2 0.8
1,000 to 1,499 miles 33.0 0.6 S S S S
1,500 to 1,999 miles 31.9 1.2 S S S S
2,000 miles or more 33.1 2.6 20.4 0.3 20.8 3.8

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 11.4 39.0 19.3
Less than 50 miles 25.7 5.3 49.5 6.4 45.1 3.3
50 to 99 miles 7.3 2.0 21.1 4.6 17.6 3.5
100 to 249 miles 16.0 1.3 31.5 1.2 29.3 1.8
250 to 499 miles 17.3 2.2 29.7 1.0 32.9 4.8
500 to 749 miles 16.3 0.7 14.9 0.3 14.9 1.7
750 to 999 miles 42.1 0.4 41.8 0.1 42.5 0.7
1,000 to 1,499 miles 46.2 0.8 S S S S
1,500 to 1,999 miles 28.2 0.5 S S 48.6 9.2
2,000 miles or more 25.5 0.6 24.7 0.3 25.0 2.8

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 12.3 40.9 18.1
Less than 50 miles 25.8 5.3 49.6 5.8 45.3 3.3
50 to 99 miles 7.3 2.0 22.7 4.8 19.5 3.4
100 to 249 miles 16.0 1.4 31.5 1.2 29.3 1.5
250 to 499 miles 17.3 2.3 31.0 0.9 34.3 4.5
500 to 749 miles 16.3 0.7 14.8 0.4 14.7 2.0
750 to 999 miles S S 37.1 37.3 0.3
1,000 to 1,499 miles S S 23.9 24.1 0.8
1,500 to 1,999 miles 25.6 0.2 36.1 0.3 34.0 3.8
2,000 miles or more 22.6 0.4 24.6 0.2 25.2 3.9

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 35.5 43.9 42.5
Less than 50 miles S S S S S S
50 to 99 miles 46.7 1.8 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 48.4 1.6 S S S S
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 41.2 11.0 S S S S
2,000 miles or more 43.4 2.0 43.3 2.8 42.7 4.5

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 35.3 S S 36.5
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 44.2 9.5 45.1 9.7 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 48.6 12.0 45.5 19.6 45.3 11.2

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 26.7 S S S S
Less than 50 miles 45.4 4.2 26.4 4.7 27.0 0.3
50 to 99 miles 45.9 4.0 29.9 5.5 33.3 0.8
100 to 249 miles 47.3 2.8 19.2 2.2 21.2 0.7
250 to 499 miles 35.2 3.8 27.6 4.1 27.1 1.8
500 to 749 miles 42.7 1.7 39.1 1.7 40.2 1.3
750 to 999 miles 45.7 0.5 S S S S
1,000 to 1,499 miles 31.2 0.4 35.6 0.8 35.7 1.7
1,500 to 1,999 miles 38.5 7.1 S S S S
2,000 miles or more 43.2 6.5 24.8 11.0 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 28.9 23.0 23.9
Less than 50 miles 45.4 4.4 26.4 4.4 27.0 0.5
50 to 99 miles 45.7 3.6 30.7 2.4 34.8 0.8
100 to 249 miles 47.3 2.8 19.2 1.9 21.2 1.0
250 to 499 miles 35.2 3.8 27.7 3.4 27.3 2.9
500 to 749 miles 42.7 1.7 39.1 1.6 40.2 3.5
750 to 999 miles 45.7 0.6 39.1 0.5 38.5 0.7
1,000 to 1,499 miles 31.2 0.6 35.6 1.0 35.7 2.8
1,500 to 1,999 miles 37.8 2.3 32.8 4.1 33.2 5.8
2,000 miles or more 45.2 7.8 31.4 3.7 30.8 7.3

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 S S S S S S
50 to 99 miles S S S S S S
100 to 249 miles
250 to 499 miles S S S S S S
500 to 749 miles
750 to 999 miles S S S S S S
1,000 to 1,499 miles
1,500 to 1,999 miles S S S S S S
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 43.1 32.7 S S
Less than 50 miles 38.4 10.1 37.8 10.9 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 49.1 3.7
1,500 to 1,999 miles 49.8 3.4 S S S S
2,000 miles or more S S 41.4 9.8 40.8 11.5

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.