Rapid Graphical Method for Estimating the Precision of Direct Microscopic Counting Data: I. Preliminary Evaluation of Technique

AUTOR(ES)

Cassell, E. Alan

RESUMO

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.

Documentos Relacionados

• Studies of Freshwater Bacteria: I. A Direct Microscopic Technique
• Mechanical Aids in the Direct Microscopic Method of Counting Bacteria
• A Direct Smear Method for Counting Microscopic Particles in Fluid Suspension
• Rapid method for counting reticulocytes
• Estimating the distribution of fitness effects from DNA sequence data: Implications for the molecular clock