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 | 15.2 | – | 13.1 | – | 13.7 | – | 19.7 |
| Single modes | 14.7 | 1.8 | 13.2 | 0.6 | 14.6 | 1.5 | 40.5 |
| Truck | 15.6 | 3.2 | 11.4 | 4.0 | 6.6 | 7.5 | 43.7 |
| Rail | 24.9 | 0.4 | 43.4 | 4.1 | 38.8 | 8.0 | 11.5 |
| All other Single modes | 47.9 | 1.9 | 37.5 | 0.8 | S | S | 5.1 |
| Multiple modes | 14.0 | 1.8 | 45.7 | 0.4 | 19.1 | 0.8 | 12.6 |
| Parcel, USPS or courier | 13.2 | 1.9 | 14.2 | 0.2 | 17.7 | 0.3 | 12.6 |
| All other multiple modes | 47.9 | 0.5 | S | S | 49.6 | 0.8 | S |
| Other and unknown modes | 45.6 | 0.9 | 33.0 | 0.6 | 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.