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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 6.2 – 18.0 – 18.3 –
Less than 50 miles 13.5 2.0 17.4 4.4 22.3 1.6
50 to 99 miles 14.5 1.0 48.7 4.8 S S
100 to 249 miles 13.4 1.7 16.5 2.9 14.9 2.0
250 to 499 miles 10.3 1.6 12.0 1.1 12.4 1.4
500 to 749 miles 7.4 1.5 9.6 0.7 10.2 1.7
750 to 999 miles 15.7 0.8 16.4 0.5 16.0 1.3
1,000 to 1,499 miles 16.2 0.7 31.5 0.4 29.8 1.8
1,500 to 1,999 miles 35.6 0.5 46.3 – 47.8 0.5
2,000 miles or more 16.2 0.7 15.1 0.2 16.0 1.6

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 7.2 – 18.3 – 18.6 –
Less than 50 miles 14.1 2.0 17.8 4.5 22.9 1.7
50 to 99 miles 17.5 1.2 49.2 4.9 S S
100 to 249 miles 13.8 1.7 16.5 2.9 14.9 2.1
250 to 499 miles 11.5 1.6 12.5 1.1 13.0 1.4
500 to 749 miles 7.8 1.6 9.8 0.7 10.4 1.8
750 to 999 miles 16.5 0.8 16.4 0.5 16.1 1.3
1,000 to 1,499 miles 18.3 0.7 31.9 0.4 30.1 1.8
1,500 to 1,999 miles 45.3 0.5 48.3 – 49.8 0.5
2,000 miles or more 19.6 0.7 16.8 0.2 16.9 1.6

Truck

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 – 15.4 – 13.8 –
Less than 50 miles 15.8 2.0 19.6 4.2 24.7 1.9
50 to 99 miles 18.1 1.2 28.3 2.6 28.0 1.7
100 to 249 miles 13.9 1.7 17.8 2.9 16.7 2.1
250 to 499 miles 11.8 1.6 9.5 1.2 9.5 1.6
500 to 749 miles 8.4 1.7 11.4 0.6 11.4 1.1
750 to 999 miles 16.5 0.9 16.4 0.5 15.9 1.8
1,000 to 1,499 miles 18.5 0.7 37.8 0.5 37.6 2.3
1,500 to 1,999 miles 45.7 0.5 48.4 – 49.8 0.8
2,000 miles or more 20.3 0.8 18.0 0.2 18.2 1.5

Rail

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 23.0 – S S 38.4 –
Less than 50 miles S S 49.8 2.2 S S
50 to 99 miles S S S S S S
100 to 249 miles 34.4 7.1 24.7 10.9 22.5 7.6
250 to 499 miles 28.4 5.5 37.1 2.8 36.1 2.1
500 to 749 miles 33.2 5.0 34.5 4.7 34.6 6.0
750 to 999 miles 46.7 1.7 42.5 1.6 43.0 3.0
1,000 to 1,499 miles 31.3 2.4 33.1 1.7 33.0 3.7
1,500 to 1,999 miles – – – – – –
2,000 miles or more 48.1 3.1 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 37.4 – S S S S
Less than 50 miles 47.9 17.0 S S S S
50 to 99 miles – – – – – –
100 to 249 miles S S S S S S
250 to 499 miles 29.8 6.5 39.3 5.2 38.1 2.6
500 to 749 miles 42.1 3.5 43.0 2.2 47.0 3.8
750 to 999 miles 32.7 2.5 37.1 4.4 37.5 3.9
1,000 to 1,499 miles 26.5 0.9 S S S S
1,500 to 1,999 miles S S S S 49.5 2.4
2,000 miles or more S S 48.4 6.0 48.8 9.2

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 14.8 – 29.5 – 25.4 –
Less than 50 miles 41.3 2.4 S S S S
50 to 99 miles 18.4 2.5 18.8 1.1 19.5 0.1
100 to 249 miles 25.4 2.0 29.1 3.0 37.4 1.1
250 to 499 miles 14.7 1.4 S S S S
500 to 749 miles 13.7 2.3 18.7 3.6 22.5 3.1
750 to 999 miles 20.8 1.3 21.6 1.1 20.6 1.3
1,000 to 1,499 miles 29.1 1.4 29.3 1.4 28.7 2.8
1,500 to 1,999 miles 33.3 1.0 34.7 0.9 34.6 2.2
2,000 miles or more 28.0 2.4 29.0 6.6 31.3 9.7

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 16.8 – 24.9 – 32.9 –
Less than 50 miles 41.3 2.4 S S S S
50 to 99 miles 18.4 2.5 18.8 1.8 19.5 0.3
100 to 249 miles 25.5 1.9 28.0 3.2 30.0 1.4
250 to 499 miles 15.9 2.6 19.3 2.2 20.8 2.1
500 to 749 miles 16.3 1.7 20.8 2.1 21.0 2.2
750 to 999 miles 20.8 1.5 21.6 0.9 20.6 1.0
1,000 to 1,499 miles 29.1 1.4 29.3 1.4 28.7 2.4
1,500 to 1,999 miles 33.3 1.0 34.7 0.8 34.6 1.9
2,000 miles or more 34.9 2.0 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 49.6 – 40.9 – 36.1 –
Less than 50 miles – – – – – –
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 S S S S S S
750 to 999 miles – – – – – –
1,000 to 1,499 miles – – – – – –
1,500 to 1,999 miles – – – – – –
2,000 miles or more S S 41.4 11.6 45.7 11.1

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 41.6 – S S 19.5 –
Less than 50 miles 42.0 8.8 S S S S
50 to 99 miles S S 49.2 5.1 48.8 2.5
100 to 249 miles 42.4 3.6 41.7 4.6 45.0 2.6
250 to 499 miles 45.0 4.2 33.0 4.1 31.6 6.5
500 to 749 miles 35.3 2.9 32.3 2.0 32.1 6.7
750 to 999 miles S S 40.2 1.7 39.6 3.7
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.