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 | 8.1 | – | 43.1 | – | S | S | 25.7 |
| Single modes | 10.5 | 5.4 | 43.4 | 1.0 | S | S | 49.1 |
| Truck | 9.0 | 5.3 | 29.9 | 11.8 | S | S | 25.9 |
| Rail | S | S | S | S | S | S | 48.1 |
| All other Single modes | 42.2 | 2.2 | 45.7 | – | 33.6 | – | 18.8 |
| Multiple modes | 9.5 | 1.7 | 17.4 | 0.1 | 17.1 | 0.6 | 9.8 |
| Parcel, USPS or courier | 9.6 | 1.7 | 13.1 | 0.1 | 17.3 | 0.6 | 9.8 |
| All other multiple modes | S | S | S | S | S | S | 31.6 |
| Other and unknown modes | S | S | S | S | 49.9 | 0.2 | 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.