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 | 9.7 | – | 15.4 | – | 16.0 | – | 15.8 |
| Single modes | 10.6 | 1.2 | 15.4 | 0.1 | 16.3 | 0.3 | 26.7 |
| Truck | 11.3 | 2.1 | 17.6 | 3.7 | 13.1 | 5.0 | 24.8 |
| Rail | 30.6 | 0.9 | 29.7 | 3.7 | 28.1 | 5.8 | 10.4 |
| All other Single modes | 23.5 | 0.5 | S | S | S | S | 11.4 |
| Multiple modes | 6.2 | 1.1 | 7.6 | – | 16.1 | 0.3 | 9.2 |
| Parcel, USPS or courier | 6.1 | 1.1 | 9.1 | – | 16.7 | 0.3 | 9.1 |
| All other multiple modes | S | S | S | S | S | S | 27.9 |
| Other and unknown modes | 35.9 | 0.6 | 36.0 | 0.1 | 18.8 | 0.2 | 19.1 |
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.