Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
Monday, July 2, 2012
Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
| Mode of transportation | 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 modes | 12.8 | – | 18.4 | – | 12.8 | – | 10.8 |
| Single modes | 15.0 | 4.0 | 19.2 | 3.7 | 13.9 | 8.7 | 14.8 |
| Truck | 7.8 | 5.1 | 26.3 | 7.2 | 11.2 | 3.0 | 15.0 |
| Rail | 46.6 | 3.5 | 30.3 | 6.6 | 17.2 | 6.9 | S |
| All other Single modes | S | S | S | S | 37.2 | 1.0 | 16.3 |
| Multiple modes | 36.9 | 4.1 | 25.9 | 3.8 | 28.6 | 8.8 | 8.9 |
| Parcel, USPS or courier | 48.5 | 4.3 | 34.1 | – | 23.4 | – | 8.8 |
| All other multiple modes | 28.1 | 0.7 | 26.0 | 3.8 | 28.6 | 8.8 | S |
| Other and unknown modes | 31.7 | 0.5 | 36.3 | 0.6 | 44.6 | 0.1 | 46.3 |
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.