Table B-3. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Distance Shipped for CBSA of Origin: 2002
Monday, July 2, 2012
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]
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 | 40.4 | – | 21.3 | – | 21.0 | – |
| Less than 50 miles | 41.1 | 4.6 | 23.3 | 4.2 | 25.9 | 6.8 |
| 50 to 99 miles | 22.3 | 2.3 | 31.4 | 2.4 | 29.0 | 2.9 |
| 100 to 249 miles | S | S | 28.6 | 1.1 | 29.6 | 2.5 |
| 250 to 499 miles | 39.3 | 1.7 | S | S | S | S |
| 500 to 749 miles | 33.0 | 0.9 | 40.6 | 0.4 | 40.8 | 1.5 |
| 750 to 999 miles | S | S | 40.1 | 0.1 | 39.5 | 0.9 |
| 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 | 34.7 | 0.3 | 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.