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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 8.8 – 18.6 – 12.1 –
Less than 50 miles 15.4 3.7 24.9 5.6 29.2 3.0
50 to 99 miles 14.2 2.1 20.0 2.4 24.2 2.9
100 to 249 miles 15.2 2.3 12.6 1.1 15.1 1.4
250 to 499 miles 12.5 1.6 25.1 2.6 26.3 3.4
500 to 749 miles 20.2 1.3 32.3 1.2 36.1 2.9
750 to 999 miles 27.0 0.7 27.4 0.3 26.9 1.2
1,000 to 1,499 miles S S 28.0 0.5 26.1 2.5
1,500 to 1,999 miles 37.0 0.4 31.7 0.1 33.4 2.0
2,000 miles or more 15.2 0.6 27.2 – 26.9 1.7

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 9.2 – 18.8 – 12.5 –
Less than 50 miles 16.1 4.2 25.1 5.6 29.4 3.2
50 to 99 miles 15.5 2.1 20.2 2.5 24.5 3.0
100 to 249 miles 16.8 3.0 12.9 1.1 15.5 1.5
250 to 499 miles 17.1 1.6 25.8 2.6 26.9 3.4
500 to 749 miles 18.3 1.3 33.0 1.2 36.8 3.0
750 to 999 miles 29.8 0.9 27.2 0.3 26.6 1.1
1,000 to 1,499 miles S S 28.3 0.5 26.4 2.5
1,500 to 1,999 miles 24.9 0.3 32.6 0.1 34.3 2.1
2,000 miles or more 23.0 0.6 21.9 – 21.6 1.3

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 11.5 – 24.4 – 10.1 –
Less than 50 miles 20.0 4.6 32.4 5.2 30.6 4.1
50 to 99 miles 16.6 2.0 20.8 2.1 18.4 2.2
100 to 249 miles 16.6 3.1 12.0 1.6 14.2 1.4
250 to 499 miles 10.9 1.0 14.0 1.5 13.5 2.5
500 to 749 miles 16.0 1.0 24.4 0.8 25.0 2.3
750 to 999 miles 33.8 0.9 27.4 0.3 26.9 1.1
1,000 to 1,499 miles S S 30.7 0.5 29.2 3.0
1,500 to 1,999 miles 28.1 0.3 32.7 0.2 34.3 2.1
2,000 miles or more 28.2 0.3 21.8 – 21.6 1.2

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances S S 40.3 – S S
Less than 50 miles S S 45.6 12.8 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 S S S S
750 to 999 miles S S S S S S
1,000 to 1,499 miles 39.8 6.5 29.9 6.7 29.5 10.8
1,500 to 1,999 miles S S 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 28.7 – 42.0 – S S
Less than 50 miles 48.1 14.9 S S 45.2 13.4
50 to 99 miles 25.5 8.8 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 46.2 2.0 S S S S
1,500 to 1,999 miles S S 36.9 1.1 37.6 1.8
2,000 miles or more 47.6 7.4 45.5 6.8 43.9 13.0

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 25.8 – 27.9 – 27.6 –
Less than 50 miles 42.0 2.5 38.4 2.7 40.2 0.4
50 to 99 miles 28.4 4.5 38.3 6.1 S S
100 to 249 miles 27.5 2.5 35.5 3.3 35.2 1.7
250 to 499 miles 26.8 4.4 39.3 6.5 37.6 5.2
500 to 749 miles S S 38.4 3.0 36.3 3.0
750 to 999 miles 29.9 0.6 S S S S
1,000 to 1,499 miles 31.8 0.8 S S S S
1,500 to 1,999 miles S S 41.5 0.6 41.0 1.7
2,000 miles or more 32.5 2.2 47.8 7.3 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 26.0 – 32.5 – 32.0 –
Less than 50 miles 42.0 2.5 38.4 5.1 40.2 0.5
50 to 99 miles 29.4 4.6 36.7 2.0 38.8 0.7
100 to 249 miles 27.5 3.6 35.5 3.4 35.2 1.7
250 to 499 miles 30.3 3.6 41.8 1.9 40.1 2.5
500 to 749 miles S S 38.4 2.9 36.3 2.6
750 to 999 miles 28.8 0.7 46.0 2.3 46.0 2.3
1,000 to 1,499 miles 31.8 0.8 S S S S
1,500 to 1,999 miles S S 41.5 0.6 41.0 1.6
2,000 miles or more 32.9 2.3 36.2 2.8 35.8 5.7

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 S S 39.9 – S S
Less than 50 miles – – – – – –
50 to 99 miles S S S S S S
100 to 249 miles – – – – – –
250 to 499 miles S S S S S S
500 to 749 miles – – – – – –
750 to 999 miles S S S S S S
1,000 to 1,499 miles – – – – – –
1,500 to 1,999 miles – – – – – –
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 26.2 – 31.0 – S S
Less than 50 miles 31.0 11.0 43.3 12.2 35.3 12.6
50 to 99 miles 45.5 6.5 48.7 4.0 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 43.3 0.5 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.