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 4.2 7.6 8.6
Less than 50 miles 10.6 1.7 14.8 5.3 11.4 0.9
50 to 99 miles 9.0 0.7 15.3 1.5 17.8 0.7
100 to 249 miles 7.6 1.9 16.3 3.2 18.3 4.4
250 to 499 miles 7.4 1.5 11.4 2.2 11.6 3.5
500 to 749 miles 11.1 0.8 14.0 0.4 16.1 1.5
750 to 999 miles 12.0 0.5 28.2 0.3 28.5 1.1
1,000 to 1,499 miles 21.2 0.5 18.5 17.4 0.6
1,500 to 1,999 miles 36.0 0.6 45.6 46.4 0.3
2,000 miles or more 20.5 0.7 14.1 13.5 0.7

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 4.6 7.8 8.7
Less than 50 miles 9.5 1.6 15.1 5.4 11.6 1.0
50 to 99 miles 8.3 0.7 15.7 1.5 19.0 0.7
100 to 249 miles 8.5 2.0 16.2 3.2 18.3 4.4
250 to 499 miles 7.9 1.6 11.4 2.2 11.6 3.5
500 to 749 miles 10.8 0.8 14.1 0.4 16.3 1.6
750 to 999 miles 11.7 0.5 28.4 0.3 28.6 1.1
1,000 to 1,499 miles 30.3 0.6 19.0 17.9 0.6
1,500 to 1,999 miles 49.8 0.6 47.5 48.4 0.4
2,000 miles or more 24.9 0.6 15.3 15.0 0.7

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 5.5 11.5 8.2
Less than 50 miles 9.8 1.6 16.2 4.4 13.9 1.6
50 to 99 miles 8.3 0.8 15.7 2.1 16.4 1.2
100 to 249 miles 9.7 2.3 6.6 1.4 7.9 1.2
250 to 499 miles 9.4 1.7 8.6 0.9 8.8 1.4
500 to 749 miles 12.0 0.9 10.8 0.1 11.3 0.7
750 to 999 miles 13.6 0.6 23.7 0.2 23.0 1.0
1,000 to 1,499 miles 31.8 0.6 18.4 17.0 0.7
1,500 to 1,999 miles S S 47.5 48.4 1.0
2,000 miles or more 26.0 0.7 15.4 15.1 1.0

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 11.7 14.6 14.6
Less than 50 miles 34.3 2.2 31.0 4.5 29.9 0.7
50 to 99 miles S S S S S S
100 to 249 miles 23.8 8.5 25.1 8.4 25.3 7.8
250 to 499 miles 14.9 7.9 15.2 6.0 15.2 5.9
500 to 749 miles 23.2 1.4 35.2 1.4 34.9 2.9
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

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 38.3 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 44.2 15.9 41.6 11.5
500 to 749 miles 46.3 6.8 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 38.9 1.2 44.0 1.5 44.0 3.5

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 19.9 39.4 13.2
Less than 50 miles 37.7 1.4 S S 41.0
50 to 99 miles S S S S S S
100 to 249 miles 17.0 3.9 S S S S
250 to 499 miles 20.4 2.4 18.8 5.4 18.8 2.1
500 to 749 miles 22.7 1.5 18.5 2.7 18.2 1.7
750 to 999 miles 24.9 0.8 27.3 1.1 26.7 1.3
1,000 to 1,499 miles 28.9 1.8 23.7 1.1 24.2 1.5
1,500 to 1,999 miles S S 31.5 0.5 32.0 1.2
2,000 miles or more 21.4 1.3 11.6 5.8 13.7 7.8

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 20.5 16.4 17.3
Less than 50 miles 37.7 1.4 S S 45.1
50 to 99 miles S S 31.8 0.9 34.0 0.1
100 to 249 miles 17.0 3.9 20.8 3.7 17.4 2.0
250 to 499 miles 20.4 2.8 18.8 2.9 18.8 1.5
500 to 749 miles 22.7 1.6 18.5 2.2 18.2 2.7
750 to 999 miles 24.9 0.8 27.3 1.2 26.7 1.6
1,000 to 1,499 miles 28.9 1.8 23.7 0.7 24.2 1.4
1,500 to 1,999 miles S S 31.5 0.5 32.0 1.7
2,000 miles or more 23.7 1.6 18.5 1.3 18.8 3.5

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 38.9 S S 26.3
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
500 to 749 miles
750 to 999 miles
1,000 to 1,499 miles
1,500 to 1,999 miles
2,000 miles or more 31.5 15.0 S S 21.7 14.5

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 32.0 S S 39.5
Less than 50 miles 47.5 7.7 S S S S
50 to 99 miles 37.3 2.3 S S S S
100 to 249 miles 33.1 7.8 46.5 9.0 S S
250 to 499 miles 38.6 8.3 S S S S
500 to 749 miles 30.9 2.5 34.2 4.4 33.7 8.0
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 S S 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.