Skip to Main Content
Skip Nav Destination
This is an Open Access book chapter distributed under the terms of the Creative Commons Attribution Licence (CC BY-NC-ND 4.0), which permits copying and redistribution for non-commercial purposes with no derivatives, provided the original work is properly cited (https://creativecommons.org/licenses/by-nc-nd/4.0/). This does not affect the rights licensed or assigned from any third party in this book. The chapter is from the book Assessment of Treatment Plant Performance and Water Quality Data: A Guide for Students, Researchers and Practitioners, Marcos von Sperling, Matthew E. Verbyla and Sílvia M. A. C. Oliveira (Authors).

This chapter presents the foundations of two of the most important frequency distributions in environmental monitoring: normal and log-normal distributions. The main characteristics, properties, and parameters are presented, with indications on how to define and interpret them. Normal distributions are widely used and are associated with a symmetric interpretation of data distribution; however, this may not be the case with environmental monitoring data. Therefore, we provide conceptual background to think about data in a nonsymmetrical way, taking the log-normal distribution to represent this typical asymmetrical behaviour of environmental data. Chapters 9 and 10 will make use of the concepts presented here.

This content is only available as PDF.
Close Modal

or Create an Account

Close Modal
Close Modal