Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
Monday, July 2, 2012
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 | 9.5 | – | 17.9 | – | 33.6 | – | 3.4 |
| Single modes | 10.8 | 2.2 | 15.0 | 4.0 | 34.1 | 6.8 | 17.3 |
| Truck | 11.5 | 2.6 | 9.2 | 6.8 | 10.3 | 9.5 | 17.4 |
| Rail | 23.2 | 1.0 | S | S | S | S | 12.0 |
| All other Single modes | 39.1 | 0.2 | S | S | S | S | 8.0 |
| Multiple modes | 16.4 | 2.1 | S | S | S | S | 3.9 |
| Parcel, USPS or courier | 13.0 | 1.0 | 10.2 | – | 17.0 | 0.2 | 3.9 |
| All other multiple modes | 48.2 | 1.5 | S | S | S | S | S |
| Other and unknown modes | 40.1 | 1.4 | S | S | S | S | 20.4 |
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.