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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 40.9 – 46.0 – 29.4 –
Less than 50 miles 33.2 9.3 49.0 6.9 35.1 10.0
50 to 99 miles S S S S S S
100 to 249 miles S S 39.9 4.3 40.0 4.9
250 to 499 miles 44.3 1.2 42.0 0.8 43.0 1.5
500 to 749 miles S S 45.9 1.0 46.3 6.1
750 to 999 miles S S S S S S
1,000 to 1,499 miles S S 49.0 – S S
1,500 to 1,999 miles 38.3 – 41.5 – 41.5 –
2,000 miles or more 39.1 0.5 43.2 0.4 41.6 9.8

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 42.7 – 45.7 – 33.8 –
Less than 50 miles 34.9 10.7 48.7 7.0 35.0 13.7
50 to 99 miles S S S S S S
100 to 249 miles S S 40.5 4.3 40.8 5.4
250 to 499 miles S S 43.1 0.8 44.4 1.8
500 to 749 miles S S 46.4 1.1 46.8 6.8
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

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 42.7 – 45.7 – 33.8 –
Less than 50 miles 34.9 10.9 48.7 7.0 35.0 13.9
50 to 99 miles S S S S S S
100 to 249 miles S S 40.5 4.3 41.0 5.6
250 to 499 miles S S 43.1 0.8 44.4 1.8
500 to 749 miles S S 46.4 1.1 46.8 6.8
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 – – – – – –
2,000 miles or more S S S S S S

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 S S S S
Less than 50 miles S S S S S S
50 to 99 miles – – – – – –
100 to 249 miles – – – – – –
250 to 499 miles – – – – – –
500 to 749 miles – – – – – –
750 to 999 miles – – – – – –
1,000 to 1,499 miles – – – – – –
1,500 to 1,999 miles – – – – – –
2,000 miles or more – – – – – –

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 – – – – – –
50 to 99 miles – – – – – –
100 to 249 miles S S S S S S
250 to 499 miles – – – – – –
500 to 749 miles – – – – – –
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 29.7 – 40.0 – S S
Less than 50 miles 28.1 6.6 34.7 8.0 37.4 1.8
50 to 99 miles 37.2 1.5 39.1 2.4 40.3 0.4
100 to 249 miles 37.7 8.8 S S S S
250 to 499 miles S S 39.7 2.6 39.6 1.1
500 to 749 miles 46.6 2.5 46.6 3.1 46.0 6.3
750 to 999 miles S S S S S S
1,000 to 1,499 miles 42.2 0.6 37.2 1.5 39.1 8.9
1,500 to 1,999 miles 47.2 – 41.5 0.2 41.6 0.7
2,000 miles or more S S 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 29.7 – 40.0 – S S
Less than 50 miles 28.1 6.6 34.7 8.0 37.4 1.8
50 to 99 miles 37.2 1.5 39.1 2.4 40.3 0.4
100 to 249 miles 37.7 8.8 S S S S
250 to 499 miles S S 39.7 2.6 39.6 1.1
500 to 749 miles 46.6 2.5 46.6 3.1 46.0 6.3
750 to 999 miles S S S S S S
1,000 to 1,499 miles 42.2 0.6 37.2 1.5 39.1 8.9
1,500 to 1,999 miles 47.2 – 41.5 0.2 41.6 0.7
2,000 miles or more S S 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 – – – – – –
Less than 50 miles – – – – – –
50 to 99 miles – – – – – –
100 to 249 miles – – – – – –
250 to 499 miles – – – – – –
500 to 749 miles – – – – – –
750 to 999 miles – – – – – –
1,000 to 1,499 miles – – – – – –
1,500 to 1,999 miles – – – – – –
2,000 miles or more – – – – – –

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 S S S S S S
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 – – – – – –
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

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.