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 | 7.7 | – | 13.7 | – | 17.1 | – | 21.2 |
| Single modes | 8.6 | 2.0 | 14.0 | 0.6 | 17.7 | 1.0 | 44.3 |
| Truck | 8.2 | 2.4 | 18.6 | 6.2 | 9.6 | 7.6 | S |
| Rail | 27.2 | 0.4 | S | S | 38.9 | 7.0 | 8.0 |
| All other Single modes | 34.0 | 1.0 | S | S | S | S | 11.6 |
| Multiple modes | 12.7 | 2.2 | 22.8 | 0.2 | 35.0 | 1.0 | 10.2 |
| Parcel, USPS or courier | 13.1 | 2.2 | 15.0 | 0.1 | 41.6 | 0.8 | 10.2 |
| All other multiple modes | S | S | 48.5 | 0.1 | 45.8 | 0.4 | S |
| Other and unknown modes | 32.0 | 1.1 | 32.0 | 0.5 | 39.0 | 0.4 | 44.1 |
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.