Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size for CBSA of Origin: 2002
Monday, July 2, 2012
Table B-4. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation and Shipment Size 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
| Shipment Weight | Value | Tons | Ton-miles | CV of average miles per shipment | |||
|---|---|---|---|---|---|---|---|
| CV | Std. error of percent | CV | Std. error of percent | CV | Std. error of percent | ||
| All shipment sizes | 40.4 | – | 21.3 | – | 21.0 | – | S |
| Less than 50 lbs | 17.2 | 2.3 | 25.0 | – | 43.6 | 1.7 | 38.0 |
| 50 to 99 lbs | 45.4 | 2.9 | 34.8 | – | 35.1 | 0.1 | 29.5 |
| 100 to 499 lbs | 25.3 | 4.2 | 33.9 | 0.4 | 29.5 | 0.3 | 16.6 |
| 500 to 749 lbs | 42.8 | 0.6 | S | S | 40.1 | 0.2 | 35.1 |
| 750 to 999 lbs | 42.9 | 0.4 | S | S | 41.8 | 0.1 | 33.6 |
| 1,000 to 9,999 lbs | S | S | S | S | 44.5 | 3.3 | 30.7 |
| 10,000 to 49,999 lbs | S | S | 24.8 | 7.4 | 26.5 | 6.7 | 31.7 |
| 50,000 to 99,999 lbs | S | S | 36.3 | 1.5 | 27.9 | 0.8 | 47.9 |
| 100,000 lbs or more | S | 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.