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 | 8.8 | – | 11.5 | – | 18.6 | – | 9.2 |
| Single modes | 9.3 | 2.6 | 11.9 | 0.7 | 19.9 | 2.7 | 8.8 |
| Truck | 9.7 | 2.9 | 9.0 | 5.7 | 14.1 | 4.6 | 9.2 |
| Rail | 39.1 | 1.3 | S | S | 39.6 | 5.1 | 14.2 |
| All other Single modes | S | S | S | S | S | S | 14.0 |
| Multiple modes | 15.0 | 1.6 | 39.6 | 0.7 | S | S | 8.8 |
| Parcel, USPS or courier | 15.3 | 1.6 | 18.3 | – | 16.7 | 0.2 | 8.9 |
| All other multiple modes | S | S | 48.2 | 0.7 | S | S | S |
| Other and unknown modes | 42.1 | 1.9 | 28.5 | 0.1 | 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.