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 7.5 23.0 12.8
Less than 50 miles 14.3 3.7 29.0 5.3 30.1 4.2
50 to 99 miles 8.0 1.2 40.7 4.0 35.6 2.8
100 to 249 miles 19.8 1.8 34.0 2.2 32.4 1.9
250 to 499 miles 14.0 1.1 16.9 0.5 15.3 0.5
500 to 749 miles 11.3 0.5 21.2 0.2 21.3 1.1
750 to 999 miles 12.5 1.5 14.4 0.6 14.7 2.4
1,000 to 1,499 miles 15.0 1.6 23.5 1.1 24.1 4.4
1,500 to 1,999 miles 20.7 0.3 38.8 0.2 39.6 1.1
2,000 miles or more 13.9 0.6 22.5 0.2 21.8 1.9

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 4.9 23.5 13.5
Less than 50 miles 13.6 4.2 29.5 5.4 30.3 4.3
50 to 99 miles 8.9 1.5 41.2 4.1 36.0 2.9
100 to 249 miles 7.6 1.3 34.6 2.2 33.1 1.9
250 to 499 miles 13.2 0.9 17.4 0.5 15.8 0.5
500 to 749 miles 13.2 0.5 21.3 0.2 21.4 1.1
750 to 999 miles 12.8 1.4 14.7 0.6 15.0 2.5
1,000 to 1,499 miles 23.4 1.8 24.5 1.1 25.1 4.5
1,500 to 1,999 miles 21.6 0.2 39.9 0.1 40.8 1.1
2,000 miles or more 16.8 0.6 23.6 0.2 22.9 1.9

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 6.2 23.3 19.4
Less than 50 miles 14.4 4.0 23.2 5.6 37.1 2.5
50 to 99 miles 9.5 1.6 42.8 4.5 40.2 3.9
100 to 249 miles 7.3 1.5 35.9 3.3 34.9 3.1
250 to 499 miles 13.0 0.7 21.4 0.8 20.4 1.0
500 to 749 miles 12.8 0.4 24.9 0.2 25.6 0.8
750 to 999 miles 15.2 1.6 15.5 0.5 15.6 2.4
1,000 to 1,499 miles 23.3 1.4 23.2 0.4 23.3 1.9
1,500 to 1,999 miles 28.1 0.2 28.8 29.1 0.7
2,000 miles or more 23.7 0.7 26.6 0.3 26.1 3.5

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 S S 18.7
Less than 50 miles 48.5 7.7 S S S S
50 to 99 miles S S S S S S
100 to 249 miles 29.2 2.4 22.1 1.5 23.5 0.8
250 to 499 miles 19.5 2.2 18.9 0.8 16.4 0.5
500 to 749 miles 23.8 2.1 30.3 1.3 29.3 2.1
750 to 999 miles 39.8 4.8 23.8 2.8 23.3 4.9
1,000 to 1,499 miles S S 34.5 6.7 35.2 8.0
1,500 to 1,999 miles 39.9 0.7 S S S S
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 29.5 37.2 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 26.4 7.1 35.5 7.0
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles 42.7 6.6 37.5 5.2 39.0 4.3
1,000 to 1,499 miles 45.1 4.6 S S S S
1,500 to 1,999 miles 46.2 2.9 S S S S
2,000 miles or more 27.1 6.8 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 16.5 24.3 24.4
Less than 50 miles 31.0 1.1 S S S S
50 to 99 miles 33.9 1.2 36.4 0.6 36.1
100 to 249 miles 30.7 2.2 34.7 3.1 S S
250 to 499 miles 26.5 2.8 27.0 4.7 28.7 2.9
500 to 749 miles 23.4 1.8 31.2 0.9 30.1 0.6
750 to 999 miles 20.7 2.9 33.1 6.7 33.9 6.8
1,000 to 1,499 miles 23.2 3.9 37.4 4.1 37.9 3.7
1,500 to 1,999 miles 34.7 1.0 39.5 1.0 38.0 2.1
2,000 miles or more 19.7 2.2 28.3 4.5 28.2 7.2

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 16.6 31.9 36.5
Less than 50 miles 31.0 1.1 S S S S
50 to 99 miles 33.9 1.2 38.8 0.7 38.2 0.1
100 to 249 miles 31.1 2.3 33.2 3.9 35.0 1.4
250 to 499 miles 26.4 2.7 31.6 5.2 32.7 3.8
500 to 749 miles 23.5 1.8 34.9 1.0 34.7 1.2
750 to 999 miles 20.8 2.9 38.4 3.6 38.2 3.9
1,000 to 1,499 miles 23.2 3.9 38.8 5.0 39.3 5.0
1,500 to 1,999 miles 35.5 1.0 45.6 0.8 44.8 1.6
2,000 miles or more 20.6 2.2 41.3 1.9 42.3 4.0

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 35.6 42.1 42.0
Less than 50 miles
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 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 27.2 44.6
Less than 50 miles S S 33.1 15.8 35.7 11.0
50 to 99 miles S S S S S S
100 to 249 miles S S S S S S
250 to 499 miles 32.6 1.6 47.5 6.9 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 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.