Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
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 | 5.8 | – | 21.0 | – | 42.8 | – | 14.0 |
| Single modes | 6.4 | 1.1 | 21.3 | 0.6 | 44.8 | 2.3 | 32.3 |
| Truck | 5.2 | 2.1 | 26.8 | 7.0 | 6.1 | 10.1 | 32.1 |
| Rail | 36.6 | 1.4 | S | S | S | S | 10.7 |
| All other Single modes | S | S | S | S | S | S | 2.6 |
| Multiple modes | 5.5 | 0.8 | 30.3 | 0.5 | 13.9 | 1.0 | 10.6 |
| Parcel, USPS or courier | 6.5 | 0.9 | 6.7 | – | 7.0 | 0.2 | 10.6 |
| All other multiple modes | 21.8 | 0.3 | 35.8 | 0.5 | 16.0 | 0.9 | 11.7 |
| Other and unknown modes | 22.1 | 0.7 | 32.0 | 0.4 | 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.