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 | – | 16.4 | – | 4.8 | – | 11.9 |
| Single modes | 10.6 | 4.4 | 17.3 | 2.1 | 6.0 | 3.4 | 20.2 |
| Truck | 10.3 | 4.6 | 19.4 | 5.8 | 6.5 | 2.3 | 18.9 |
| Rail | 10.4 | 0.2 | 9.1 | 1.3 | 6.3 | 1.6 | 7.7 |
| All other Single modes | 41.3 | 1.8 | S | S | S | S | 8.3 |
| Multiple modes | 33.4 | 4.4 | 36.1 | 2.1 | 28.9 | 3.7 | 5.7 |
| Parcel, USPS or courier | 34.3 | 4.0 | 20.1 | – | 26.8 | 0.3 | 5.7 |
| All other multiple modes | 41.3 | 0.9 | 38.3 | 2.1 | 31.0 | 3.7 | 46.7 |
| Other and unknown modes | 21.3 | 0.5 | 27.8 | 0.3 | 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.