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 8.7 9.6 8.7
Less than 50 miles 15.5 2.1 22.9 5.9 19.1 0.6
50 to 99 miles 14.4 0.5 10.3 1.3 10.6 0.4
100 to 249 miles 11.8 2.0 9.4 2.8 11.4 2.0
250 to 499 miles 11.5 1.3 14.5 2.2 16.0 3.3
500 to 749 miles 10.6 1.2 10.9 0.7 11.7 2.3
750 to 999 miles 12.0 0.9 39.7 3.4 37.1 4.9
1,000 to 1,499 miles 15.6 0.3 10.1 0.1 10.4 0.7
1,500 to 1,999 miles 27.0 1.1 15.1 0.1 15.7 0.5
2,000 miles or more 22.8 0.7 13.5 12.9 0.8

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 8.4 9.3 8.9
Less than 50 miles 12.3 1.7 22.3 5.9 19.1 0.6
50 to 99 miles 13.8 0.5 10.3 1.3 10.7 0.4
100 to 249 miles 11.8 2.0 9.1 2.7 11.2 2.0
250 to 499 miles 11.5 1.4 14.9 2.2 16.5 3.3
500 to 749 miles 10.4 1.2 10.8 0.7 11.6 2.3
750 to 999 miles 12.3 0.9 40.0 3.4 37.4 5.0
1,000 to 1,499 miles 16.5 0.3 10.4 0.1 10.6 0.7
1,500 to 1,999 miles 28.8 1.1 15.0 0.1 15.5 0.5
2,000 miles or more 24.6 0.7 14.3 13.9 0.8

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 8.6 11.4 12.6
Less than 50 miles 12.5 1.6 23.0 6.4 20.6 0.9
50 to 99 miles 13.7 0.5 10.4 1.6 10.2 0.6
100 to 249 miles 11.9 2.0 8.2 2.6 8.1 1.9
250 to 499 miles 11.7 1.3 13.3 1.7 13.4 2.8
500 to 749 miles 9.2 1.2 10.0 0.9 10.0 2.0
750 to 999 miles 12.5 0.9 48.9 3.9 47.6 6.0
1,000 to 1,499 miles 17.9 0.4 9.1 9.1 0.4
1,500 to 1,999 miles 16.4 0.3 15.2 0.2 15.8 0.9
2,000 miles or more 28.3 0.7 18.1 17.9 1.3

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 10.3 15.1 15.9
Less than 50 miles S S 37.0 3.7 22.1 0.1
50 to 99 miles 24.2 0.4 27.7 0.8 28.8 0.2
100 to 249 miles 18.7 3.7 23.1 6.2 29.2 3.8
250 to 499 miles 18.8 3.7 49.2 5.8 47.6 5.2
500 to 749 miles 33.4 5.2 25.3 4.8 25.9 5.0
750 to 999 miles 14.9 2.7 13.3 1.4 13.6 3.3
1,000 to 1,499 miles 14.7 0.7 17.9 0.7 17.7 2.4
1,500 to 1,999 miles S S 33.8 35.7 0.4
2,000 miles or more 46.4 1.4 27.3 0.2 27.7 0.9

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 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 S S S S S S
250 to 499 miles S S S S S S
500 to 749 miles S S 49.0 11.2 48.8 10.4
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

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 8.7 45.1 25.8
Less than 50 miles S S S S 24.3
50 to 99 miles 42.8 2.8 28.4 1.6 31.4 0.1
100 to 249 miles 22.9 2.4 S S S S
250 to 499 miles 26.0 3.2 S S S S
500 to 749 miles 11.5 3.0 30.2 7.9 31.9 4.9
750 to 999 miles 17.6 3.2 S S S S
1,000 to 1,499 miles 18.0 0.9 19.3 0.6 19.3 0.9
1,500 to 1,999 miles 23.3 1.2 39.8 2.3 41.0 3.5
2,000 miles or more 34.2 2.8 42.1 4.0 33.7 7.7

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 11.9 9.8 11.1
Less than 50 miles S S S S 24.8
50 to 99 miles 42.8 2.9 28.4 1.9 31.4 0.3
100 to 249 miles 23.1 2.5 30.7 3.3 22.2 0.7
250 to 499 miles 23.9 3.2 16.7 2.5 16.9 2.2
500 to 749 miles 15.3 2.4 13.3 3.9 12.8 4.2
750 to 999 miles 17.2 2.9 19.5 2.3 19.5 2.5
1,000 to 1,499 miles 18.0 1.1 19.3 0.7 19.3 1.0
1,500 to 1,999 miles 24.3 0.8 27.5 1.0 28.1 2.4
2,000 miles or more 31.3 3.1 29.0 1.0 28.1 3.2

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 32.1 S S 29.1
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 42.9 9.6 35.3 10.1 36.1 5.9
750 to 999 miles S S S S S S
1,000 to 1,499 miles
1,500 to 1,999 miles S S 47.3 2.9 47.4 4.3
2,000 miles or more 47.4 9.2 47.1 11.0 36.5 10.2

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 42.0 42.5 31.5
Less than 50 miles S S S S S S
50 to 99 miles S S 46.9 2.1 45.1 0.8
100 to 249 miles S S 41.7 9.9 41.8 8.8
250 to 499 miles 30.9 5.4 S S S S
500 to 749 miles S S 49.2 3.5 48.8 5.5
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.