Table B-5c. Estimated Standard Error of Percentage for Export Shipment Characteristics by Commodity Group: Percent of Total for 2002 and 1997
Monday, July 2, 2012
Table B-5c. Estimated Standard Error of Percentage for Export Shipment Characteristics by Commodity Group: Percent of Total for 2002 and 1997
[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]
| SCTG code | Description | Value | Tons | ||
|---|---|---|---|---|---|
| Std. error of percent 2002 | Std. error of percent 1997 | Std. error of percent 2002 | Std. error of percent 1997 | ||
| All Commodities | – | – | – | – | |
| 01-05 | Agriculture products and fish | 0.9 | 0.8 | 3.9 | 3.1 |
| 06-09 | Grains, alcohol, and tobacco products | 0.3 | 0.2 | 0.6 | 0.5 |
| 10-14 | Stones, nonmetallic minerals, and metallic ores. | 0.1 | – | 1.9 | 0.8 |
| 15-19 | Coal and petroleum products | 0.3 | 0.2 | 2.7 | 0.8 |
| 20-24 | Pharmaceutical and chemical products | 0.9 | 2.5 | 1.6 | 3.3 |
| 25-30 | Logs, wood products, and textile and leather | 0.5 | 0.4 | 0.8 | 1.4 |
| 31-34 | Base metal and machinery | 1.3 | 0.7 | 1.0 | 0.9 |
| 35-38 | Electronic, motorized vehicles, and precision instruments | 2.2 | 2.6 | 0.6 | 0.3 |
| 39-43 | Furniture, mixed freight and misc. manufactured products | 0.6 | 0.5 | 0.5 | 0.9 |
| -- | Commodity unknown | 0.1 | 0.3 | S | 0.1 |
KEY:
– Represents an estimate 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.
NOTE: The Introduction and appendixes give information on 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: Research and Innovative Technologies Administration, Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Export Data, March 2005.