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 | 7.2 | – | 9.1 | – | 20.3 | – | 11.6 |
| Single modes | 7.2 | 1.5 | 9.2 | 0.3 | 21.1 | 1.3 | 19.9 |
| Truck | 7.1 | 1.9 | 9.0 | 4.2 | 6.5 | 6.2 | 18.7 |
| Rail | 26.0 | 0.4 | 47.9 | 5.0 | 44.2 | 7.3 | 7.9 |
| All other Single modes | 21.1 | 1.3 | 29.1 | 2.7 | S | S | 7.3 |
| Multiple modes | 14.4 | 1.4 | 23.2 | 0.1 | 23.2 | 1.3 | 7.7 |
| Parcel, USPS or courier | 6.4 | 0.9 | 11.2 | – | 15.6 | 0.3 | 7.7 |
| All other multiple modes | S | S | 36.1 | 0.1 | 29.6 | 1.1 | 31.3 |
| Other and unknown modes | 24.7 | 0.6 | 23.0 | 0.3 | 40.9 | 0.7 | 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.