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 | 6.2 | – | 14.6 | – | 15.3 | – | 10.7 |
| Single modes | 8.7 | 2.7 | 14.2 | 1.4 | 15.4 | 1.1 | 11.9 |
| Truck | 9.2 | 2.3 | 11.9 | 6.1 | 12.0 | 3.9 | 15.7 |
| Rail | 38.9 | 0.7 | 47.5 | 3.8 | 11.4 | 2.1 | 47.8 |
| All other Single modes | 27.1 | 1.9 | 34.8 | 6.0 | 39.1 | 4.9 | 8.8 |
| Multiple modes | 14.7 | 2.7 | 28.6 | 0.1 | 36.1 | 0.7 | 6.0 |
| Parcel, USPS or courier | 13.0 | 2.4 | 16.3 | 0.1 | 15.6 | 0.2 | 6.0 |
| All other multiple modes | S | S | S | S | S | S | S |
| Other and unknown modes | 32.5 | 0.9 | S | S | S | S | 34.5 |
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.