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How to Evaluate and Quantify the Influence of Coincidence on Fertility and Herd Health Parameters? A Practical Overview of Frequently Used and Abused Statistical Techniques in Research and Practice
Author(s) -
Dewulf J,
Maes D,
Van Soom A,
De Kruif A
Publication year - 2009
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/j.1439-0531.2009.01489.x
Subject(s) - variation (astronomy) , statistics , range (aeronautics) , herd , statistical hypothesis testing , econometrics , mathematics , psychology , biology , ecology , engineering , physics , astrophysics , aerospace engineering
Contents In this article, frequently encountered statistical questions and methods used both in research and in daily practice are described and explained. First, the concepts of variability and uncertainty are explained and illustrated. From this, it is explained how variation can be quantified and how the limits of what can be expected as a result of normal variation are determined both for continuous and binary data. Based on the basic concepts of probability theory, an introduction to risk assessment was given. Finally it is explained how to test whether individual observations lie outside the normal range or the test whether populations are different from each other. All these are carried out avoiding theory and formulas as much as possible and illustrated with real examples from reproduction and herd health.