| Autor: |
Dale E. Phinney, James E. Newman |
| Rok vydání: |
1972 |
| Předmět: |
|
| Zdroj: |
Journal of the Air Pollution Control Association. 22:692-695 |
| ISSN: |
0002-2470 |
| DOI: |
10.1080/00022470.1972.10469700 |
| Popis: |
The frequency distribution of total suspended particulate matter for Indianapolis, Ind., was examined in order to determine the precision associated with any given sampling scheme. By assuming a basic loge-normal distribution, a theoretical set of confidence intervals about the geometric mean was derived for random sampling. Verification of the loge-normal distribution was made for particulate matter in Indianapolis. Application of the derived confidence intervals revealed that for a 30-day period 20 samples must be taken to ensure that the 90% confidence interval will be within 10% of the geometric mean. Analysis of the records for 19 sampling locations within Indianapolis revealed that only 2 sites possessed sufficient data to allow monthly climatological evaluation over the period 1968-1970. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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