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 | 5.1 | – | 9.8 | – | 18.0 | – | 10.6 |
| Single modes | 5.0 | 1.6 | 10.0 | 0.8 | 18.1 | 0.9 | 9.9 |
| Truck | 4.8 | 2.3 | 10.5 | 5.5 | 11.1 | 6.6 | 8.9 |
| Rail | 27.9 | 2.6 | 22.6 | 5.6 | 24.2 | 7.0 | 6.4 |
| All other Single modes | 49.4 | 0.4 | S | S | S | S | 12.8 |
| Multiple modes | 14.1 | 1.4 | 29.4 | 0.2 | 20.9 | 0.4 | 8.5 |
| Parcel, USPS or courier | 15.5 | 1.5 | 5.8 | – | 7.9 | 0.1 | 8.6 |
| All other multiple modes | 44.2 | 0.3 | 43.3 | 0.2 | 32.6 | 0.4 | 28.1 |
| Other and unknown modes | 29.4 | 0.7 | 48.6 | 0.7 | 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.