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 | 13.7 | – | 25.6 | – | 14.0 | – | 12.0 |
| Single modes | 16.5 | 2.4 | 25.4 | 0.6 | 14.4 | 1.3 | 9.2 |
| Truck | 17.4 | 2.4 | 28.9 | 4.5 | 10.8 | 4.1 | 12.7 |
| Rail | 19.7 | 0.4 | 46.7 | 4.8 | 29.2 | 4.6 | 33.4 |
| All other Single modes | 23.3 | 0.8 | S | S | 45.2 | 0.1 | 9.1 |
| Multiple modes | 17.1 | 2.2 | 19.0 | – | 29.9 | 0.5 | 9.9 |
| Parcel, USPS or courier | 17.1 | 2.1 | 8.9 | – | 10.2 | 0.2 | 9.9 |
| All other multiple modes | 39.9 | 0.1 | S | S | S | S | 22.3 |
| Other and unknown modes | 29.7 | 1.1 | 42.3 | 0.7 | S | S | 33.5 |
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.