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 | 9.8 | – | 14.7 | – | 27.5 | – | 18.1 |
| Single modes | 13.7 | 3.5 | 14.8 | 0.6 | 28.3 | 2.8 | 29.4 |
| Truck | 10.6 | 4.2 | 9.2 | 6.5 | 17.0 | 6.8 | 48.2 |
| Rail | 36.1 | 0.6 | 49.8 | 6.8 | S | S | S |
| All other Single modes | S | S | 49.0 | – | 28.7 | 0.3 | 12.9 |
| Multiple modes | 13.4 | 3.2 | 26.1 | 0.3 | 39.7 | 1.1 | 6.6 |
| Parcel, USPS or courier | 15.0 | 3.2 | 24.4 | 0.3 | 21.7 | 1.2 | 6.7 |
| All other multiple modes | S | S | S | S | S | S | 44.5 |
| Other and unknown modes | S | S | S | S | S | S | 43.3 |
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.