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 | 6.4 | – | 17.8 | – | 21.8 | – | 10.7 |
| Single modes | 6.4 | 0.9 | 17.9 | 0.6 | 22.2 | 0.5 | 12.3 |
| Truck | 6.5 | 0.8 | 19.2 | 3.9 | 12.0 | 7.4 | 13.0 |
| Rail | 14.7 | 0.2 | 34.5 | 3.4 | 37.8 | 7.6 | 11.1 |
| All other Single modes | 23.6 | 0.2 | 32.8 | 0.2 | 35.5 | 0.3 | 12.5 |
| Multiple modes | 9.6 | 0.8 | 33.9 | 0.2 | 36.6 | 0.5 | 3.4 |
| Parcel, USPS or courier | 9.7 | 0.7 | 12.1 | – | 9.7 | – | 3.4 |
| All other multiple modes | S | S | S | S | S | S | S |
| Other and unknown modes | 26.5 | 0.6 | S | S | 42.0 | 0.3 | 49.8 |
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.