| Literature DB >> 14330324 |
Abstract
A graphical method of estimating the 90, 95, or 99% confidence intervals of direct microscopic counting data is presented. Construction of the graphs is based on the assumption that the normal distribution approximates the Poisson distribution. The method, useful on data obtained from dried films or counting chambers, eliminates time-consuming computation of precision. The minimal number of fields which must be counted to maintain a certain level of precision can be readily determined.Keywords: BLOOD CELL COUNT; EXPERIMENTAL LAB STUDY; MICROSCOPY; STATISTICS
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Year: 1965 PMID： 14330324 PMCID： PMC1058245 DOI： 10.1128/am.13.3.293-296.1965
Source DB: PubMed Journal: Appl Microbiol ISSN： 0003-6919