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 6.5 17.4 18.2
Less than 50 miles 9.6 1.9 26.3 7.8 23.4 1.5
50 to 99 miles 16.0 1.1 46.6 2.8 46.5 1.2
100 to 249 miles 12.8 1.8 28.6 4.2 22.3 3.3
250 to 499 miles 6.0 0.9 22.7 2.8 29.6 3.6
500 to 749 miles 10.0 1.5 14.2 1.7 15.9 2.0
750 to 999 miles 15.8 0.7 14.9 0.6 15.3 0.9
1,000 to 1,499 miles 25.2 0.6 25.3 0.3 25.6 0.9
1,500 to 1,999 miles 11.7 0.4 13.0 0.2 12.8 0.9
2,000 miles or more 26.9 0.3 25.8 25.6 0.5

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 6.5 17.5 18.5
Less than 50 miles 9.6 1.9 26.5 7.8 23.5 1.5
50 to 99 miles 16.9 1.2 46.7 2.8 46.6 1.3
100 to 249 miles 13.9 1.9 29.4 4.2 24.3 3.5
250 to 499 miles 5.0 0.9 22.4 2.9 30.0 3.6
500 to 749 miles 8.6 1.4 14.1 1.7 15.8 2.2
750 to 999 miles 15.0 0.7 15.2 0.6 15.6 1.0
1,000 to 1,499 miles 23.6 0.6 24.4 0.3 24.7 0.8
1,500 to 1,999 miles 12.6 0.4 12.8 0.1 12.3 0.9
2,000 miles or more 28.0 0.3 22.1 22.0 0.3

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 6.5 18.9 13.7
Less than 50 miles 9.7 1.9 26.6 7.5 23.6 1.5
50 to 99 miles 17.0 1.2 47.4 3.1 47.3 1.9
100 to 249 miles 14.5 2.0 33.0 4.2 27.9 3.2
250 to 499 miles 3.9 1.0 7.2 2.3 7.8 2.0
500 to 749 miles 8.5 1.5 11.0 1.5 11.7 2.2
750 to 999 miles 15.2 0.7 14.7 0.6 14.6 1.1
1,000 to 1,499 miles 23.6 0.5 25.9 0.3 25.9 1.1
1,500 to 1,999 miles 12.0 0.4 15.5 0.1 14.7 1.0
2,000 miles or more 30.3 0.3 24.7 24.7 0.5

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 30.4 36.3 30.4
Less than 50 miles S S S S 49.3 0.1
50 to 99 miles 46.3 0.6 S S 49.9 0.2
100 to 249 miles 49.1 7.7 S S 46.9 8.6
250 to 499 miles S S 39.0 6.2 37.3 4.5
500 to 749 miles 19.5 5.9 30.0 5.1 30.7 4.6
750 to 999 miles 36.7 2.0 33.5 3.3 33.4 5.8
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 48.8 5.7 36.3 1.2 36.9 2.9
2,000 miles or more 37.7 0.6 47.1 0.2 46.5 1.0

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 31.7 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 39.0 0.7
250 to 499 miles 37.9 9.7 S S S S
500 to 749 miles S S S S S S
750 to 999 miles 47.3 4.1 S S S S
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 35.2 2.7 48.8 3.8 46.7 6.5
2,000 miles or more S S S S 50.0 1.6

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 23.8 43.3 41.9
Less than 50 miles S S S S S S
50 to 99 miles 31.6 1.0 32.2 0.6 33.7 0.1
100 to 249 miles 18.7 2.5 S S S S
250 to 499 miles 30.3 3.0 17.9 6.6 18.7 4.3
500 to 749 miles 44.3 3.7 46.6 2.0 46.1 2.0
750 to 999 miles 36.1 1.8 41.2 2.8 40.9 3.5
1,000 to 1,499 miles 21.7 1.1 29.6 0.4 30.6 1.2
1,500 to 1,999 miles 26.0 1.2 28.1 4.4 28.8 7.3
2,000 miles or more 22.0 0.6 S S 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 25.7 26.7 24.4
Less than 50 miles S S S S S S
50 to 99 miles 31.6 1.1 32.2 1.2 33.7 0.4
100 to 249 miles 21.7 3.4 32.7 3.0 32.4 1.8
250 to 499 miles 34.6 3.1 36.3 2.5 36.2 2.4
500 to 749 miles 45.2 3.8 22.9 2.6 22.8 2.4
750 to 999 miles 37.7 1.9 40.2 1.9 40.1 2.8
1,000 to 1,499 miles 20.3 1.5 31.2 1.5 32.3 2.0
1,500 to 1,999 miles 34.4 1.0 28.8 1.2 28.0 2.6
2,000 miles or more 26.2 0.7 31.3 0.5 31.2 1.6

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 22.3 S S S S
Less than 50 miles
50 to 99 miles
100 to 249 miles S S S S S S
250 to 499 miles 31.1 8.6 31.0 9.9 30.5 4.9
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 29.0 9.2 29.5 13.0 30.2 12.5
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 23.0 39.9 43.6
Less than 50 miles 40.1 5.3 40.4 7.2 S S
50 to 99 miles 37.1 0.8 41.7 1.7 37.7 0.6
100 to 249 miles 43.2 6.2 22.5 5.1 24.5 3.3
250 to 499 miles 43.2 6.1 S S S S
500 to 749 miles S S S S S S
750 to 999 miles S S 43.5 1.0 43.7 3.8
1,000 to 1,499 miles S S S S S S
1,500 to 1,999 miles 43.4 1.9 37.4 1.7 37.9 7.2
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.