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 | 6.6 | – | 12.9 | – | 12.9 | – | 3.7 |
| Single modes | 6.8 | 1.8 | 13.4 | 2.4 | 13.4 | 2.0 | 7.2 |
| Truck | 5.6 | 1.9 | 15.3 | 3.3 | 9.1 | 4.4 | 5.6 |
| Rail | 26.8 | 1.2 | 13.8 | 2.2 | 19.3 | 5.1 | 12.8 |
| All other Single modes | 27.3 | 0.2 | 49.2 | 0.9 | S | S | 8.3 |
| Multiple modes | 10.4 | 1.3 | S | S | S | S | 4.8 |
| Parcel, USPS or courier | 9.2 | 1.1 | 8.3 | – | 6.8 | 0.1 | 4.8 |
| All other multiple modes | S | S | S | S | S | S | 21.6 |
| Other and unknown modes | 45.7 | 1.7 | S | S | 37.6 | 0.6 | 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.