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 8.3 19.1 14.3
Less than 50 miles 14.6 2.6 20.4 2.9 16.6 1.7
50 to 99 miles 22.9 2.9 33.6 2.0 32.9 1.7
100 to 249 miles 12.5 1.0 22.4 1.6 21.1 2.0
250 to 499 miles 14.3 0.7 26.1 0.4 32.1 1.9
500 to 749 miles 14.4 1.1 21.1 0.4 23.0 2.0
750 to 999 miles 15.6 1.4 23.6 0.4 23.4 1.5
1,000 to 1,499 miles 17.6 1.3 12.0 0.2 11.9 1.2
1,500 to 1,999 miles 17.6 0.9 8.3 0.1 8.1 1.3
2,000 miles or more 15.1 1.0 13.2 0.2 13.0 1.9

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 13.9 19.4 14.2
Less than 50 miles 16.3 2.6 20.4 3.0 16.6 1.8
50 to 99 miles 28.9 3.1 35.9 2.3 35.1 2.1
100 to 249 miles 19.0 1.5 23.2 1.7 21.8 2.2
250 to 499 miles 17.3 0.8 27.0 0.5 33.2 2.2
500 to 749 miles 14.1 1.1 21.7 0.3 23.8 2.2
750 to 999 miles 17.8 1.1 23.5 0.3 23.8 1.6
1,000 to 1,499 miles 12.0 0.6 12.4 0.2 12.6 1.2
1,500 to 1,999 miles 21.7 1.4 15.8 0.1 15.4 1.7
2,000 miles or more 13.8 0.7 13.8 0.1 13.8 1.7

Truck

Distance Shipped Value Tons Ton-miles
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All distances 14.4 19.4 12.7
Less than 50 miles 16.3 2.5 20.4 2.9 16.6 1.8
50 to 99 miles 30.2 3.1 36.0 2.3 35.1 2.2
100 to 249 miles 19.2 1.5 23.4 1.6 21.8 2.1
250 to 499 miles 17.7 0.9 13.1 0.2 13.8 0.4
500 to 749 miles 14.0 1.0 18.1 0.4 18.0 2.1
750 to 999 miles 18.5 1.2 23.6 0.3 23.9 1.8
1,000 to 1,499 miles 14.9 0.6 12.3 0.2 12.5 1.1
1,500 to 1,999 miles 20.4 1.2 15.8 0.1 15.3 1.8
2,000 miles or more 12.3 0.7 13.3 0.1 13.3 1.6

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 39.9 48.2
Less than 50 miles
50 to 99 miles
100 to 249 miles S S S S S S
250 to 499 miles S S 45.7 10.1 48.1 10.6
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 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 24.2 38.4 40.3
Less than 50 miles
50 to 99 miles S S 42.0 4.1 44.7 1.9
100 to 249 miles 47.7 1.9 S S S S
250 to 499 miles 44.1 1.2 S S S S
500 to 749 miles 42.4 3.0 47.9 6.5 44.1 3.9
750 to 999 miles 36.5 5.9 S S 47.9 2.6
1,000 to 1,499 miles 35.8 8.0 S S S S
1,500 to 1,999 miles S S 42.4 4.5 41.5 6.9
2,000 miles or more 37.5 6.1 44.0 7.5 43.4 10.0

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 11.8 20.4 23.5
Less than 50 miles 23.4 2.4 38.2 2.1 25.0
50 to 99 miles 25.0 2.8 19.4 2.3 21.1 0.2
100 to 249 miles 22.1 1.7 25.2 1.9 22.8 0.4
250 to 499 miles 23.7 1.5 22.4 0.7 24.4 0.4
500 to 749 miles 18.6 1.3 26.7 1.3 27.6 1.0
750 to 999 miles 19.1 1.9 30.6 1.7 30.9 1.6
1,000 to 1,499 miles 21.5 2.3 25.0 1.1 24.6 1.1
1,500 to 1,999 miles 23.1 0.6 36.5 1.5 36.4 2.2
2,000 miles or more 22.8 2.1 22.8 1.0 22.9 3.1

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 11.8 20.5 23.6
Less than 50 miles 23.4 2.4 38.2 2.1 25.0
50 to 99 miles 25.0 2.8 19.4 2.4 21.1 0.2
100 to 249 miles 22.3 1.7 25.8 2.0 23.6 0.4
250 to 499 miles 23.7 1.5 22.4 0.7 24.4 0.4
500 to 749 miles 18.6 1.3 26.7 1.3 27.6 1.1
750 to 999 miles 19.1 1.9 30.6 1.7 30.9 1.6
1,000 to 1,499 miles 21.5 2.3 25.0 1.1 24.6 1.1
1,500 to 1,999 miles 23.1 0.6 36.5 1.4 36.4 2.2
2,000 miles or more 22.8 2.1 22.8 1.1 23.0 3.1

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 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
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 27.9 34.3 18.7
Less than 50 miles 42.1 7.9 S S 49.9 0.7
50 to 99 miles 41.0 8.0 S S S S
100 to 249 miles S S 49.8 4.8 49.5 1.5
250 to 499 miles 34.6 1.8 39.4 1.3 41.8 1.1
500 to 749 miles S S 47.2 7.0 48.6 10.8
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

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.