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 7.7 15.5 22.6
Less than 50 miles 15.9 3.1 26.0 7.0 18.3 0.7
50 to 99 miles 9.9 0.4 22.9 1.1 24.0 0.4
100 to 249 miles 7.8 1.2 16.2 1.5 14.6 1.3
250 to 499 miles 8.9 1.4 18.9 1.9 20.8 1.2
500 to 749 miles 9.8 0.8 27.8 1.8 29.3 1.3
750 to 999 miles 15.1 0.8 19.9 0.7 20.6 2.1
1,000 to 1,499 miles 34.3 1.2 32.2 0.6 32.8 1.7
1,500 to 1,999 miles 16.2 1.3 26.5 1.9 26.9 3.1
2,000 miles or more 11.9 1.3 29.3 1.2 29.8 4.4

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 9.7 16.1 24.7
Less than 50 miles 16.8 3.2 27.0 7.0 18.7 0.8
50 to 99 miles 10.9 0.5 23.2 1.1 24.3 0.5
100 to 249 miles 7.8 1.5 16.1 1.5 14.6 1.5
250 to 499 miles 11.4 1.7 20.1 1.7 22.1 1.6
500 to 749 miles 14.3 0.9 30.0 1.9 31.6 1.4
750 to 999 miles 16.5 0.8 21.8 0.8 22.6 2.4
1,000 to 1,499 miles 36.4 1.3 33.0 0.6 33.6 1.9
1,500 to 1,999 miles 21.4 1.5 26.9 2.0 27.2 2.9
2,000 miles or more 17.9 1.0 34.4 1.3 34.9 4.5

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 9.4 19.9 11.4
Less than 50 miles 16.7 3.8 27.9 7.1 20.8 2.4
50 to 99 miles 10.9 0.5 23.6 1.7 25.1 0.7
100 to 249 miles 8.5 1.9 16.9 2.0 13.5 1.7
250 to 499 miles 11.4 2.0 13.6 1.2 12.7 1.5
500 to 749 miles 11.9 0.5 18.0 0.9 18.2 1.3
750 to 999 miles 20.0 0.6 12.3 0.5 12.1 0.9
1,000 to 1,499 miles S S S S 49.4 3.5
1,500 to 1,999 miles 33.5 1.6 36.4 1.5 37.2 4.4
2,000 miles or more 16.7 0.8 23.7 0.9 24.0 4.2

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 21.9 27.3 33.1
Less than 50 miles 36.4 0.1 38.5 4.1 34.6 0.3
50 to 99 miles S S S S S S
100 to 249 miles 33.9 1.1 40.4 1.6 40.9 0.5
250 to 499 miles 33.4 3.8 34.3 4.0 35.3 2.6
500 to 749 miles 27.9 2.9 40.0 2.8 40.1 2.5
750 to 999 miles 33.9 4.4 29.8 2.9 29.2 3.3
1,000 to 1,499 miles 34.8 1.7 39.6 1.7 40.2 1.6
1,500 to 1,999 miles 25.2 4.4 34.0 4.5 34.2 4.9
2,000 miles or more 32.0 4.6 43.1 4.5 42.9 5.9

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 31.8 36.6 29.7
Less than 50 miles
50 to 99 miles S S S S S S
100 to 249 miles S S 38.2 18.3 36.1 15.2
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles 45.1 0.9 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 17.8 30.2 34.8
Less than 50 miles 36.3 1.1 S S S S
50 to 99 miles 23.2 0.7 14.8 0.7 14.1
100 to 249 miles 26.7 2.5 44.8 2.9 43.6 0.8
250 to 499 miles 22.9 1.7 47.6 1.8 47.7 1.2
500 to 749 miles 25.6 2.0 S S S S
750 to 999 miles 34.8 1.6 S S S S
1,000 to 1,499 miles 39.5 1.2 S S S S
1,500 to 1,999 miles 25.9 2.2 39.0 2.0 39.8 2.7
2,000 miles or more 21.5 3.5 47.0 10.0 44.1 8.6

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 19.1 39.9 S S
Less than 50 miles 38.8 1.5 29.4 2.0 31.1
50 to 99 miles 23.2 1.0 14.8 2.1 14.1 0.2
100 to 249 miles 28.1 2.7 28.5 3.6 29.3 0.8
250 to 499 miles 23.4 1.6 31.4 1.7 28.9 0.8
500 to 749 miles 24.9 1.7 32.9 1.9 32.3 1.3
750 to 999 miles 32.0 1.7 46.4 3.0 47.0 2.4
1,000 to 1,499 miles 46.7 1.4 S S S S
1,500 to 1,999 miles 28.0 2.9 S S S S
2,000 miles or more 23.8 3.0 S S S S

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 29.0 33.1 38.4
Less than 50 miles S S S S S S
50 to 99 miles
100 to 249 miles 46.5 1.8 S S 47.0 1.0
250 to 499 miles S S S S S S
500 to 749 miles S S S S S S
750 to 999 miles 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 46.4 11.6 S S 48.4 10.8

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 24.8 46.9 36.7
Less than 50 miles 37.5 10.7 S S 40.2 11.0
50 to 99 miles S S S S S S
100 to 249 miles 44.6 2.0 36.2 3.0 32.7 1.5
250 to 499 miles S S S S S S
500 to 749 miles 45.0 0.9 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 49.9 3.4 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.