Rapid Graphical Method for Estimating the Precision of Direct Microscopic Counting Data-Reference-Cited by-同舟云学术

Rapid Graphical Method for Estimating the Precision of Direct Microscopic Counting Data

Published:1965-05 Issue:3 Volume:13 Page:293-296
ISSN:0003-6919
Container-title:Applied Microbiology
language:en
Short-container-title:Appl Microbiol

Author:

Cassell E. Alan¹

Affiliation:

1. Department of Civil Engineering, Clarkson College of Technology, Potsdam, New York

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.

Publisher

American Society for Microbiology

Subject

General Pharmacology, Toxicology and Pharmaceutics,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine

Link

https://journals.asm.org/doi/pdf/10.1128/am.13.3.293-296.1965

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5. HALD A. 1952. Statistical theory with engineering applications. John Wiley and Sons Inc. New York.

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