Benjamin/Cummings, 1999 - Science - 620 pages
This coherent text translates the methods of statisticians into "ecological English" so that students may readily apply these methods to the real world. Ecological Methodology, Second Edition provides a balance of material on animal and plant populations. It teaches students of ecology how to design the most efficient tests in order to obtain maximum precision with minimal work. The first part of the text focuses on biological and technical issues in statistical methodology. Students learn about advances that have been made in designing better sampling devices, along with the techniques and equipment used for sampling. The second part deals with creating solid statistical design, and presents all methods that are well-known to statisticians in a language and context that students will easily understand.
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In this simple case we need to have an estimate of s, the standard deviation of
the variable measured. How can we get an estimate of the standard deviation?
There are four ways you may get this for the variable you are studying: 1.
Note that by scaling our means in relation to the standard deviation, we implicitly
bring the variability of the data into our power analysis. The effect size that is
ecologically significant will depend on the specific situation, and is part of the
To convert standard deviations or standard errors, Sr = cyo (15.2) where Sr =
Transformed standard error or standard deviation So = Original standard error or
standard deviation c = Constant of conversion If a fixed amount is added to or ...