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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The reliability of a Poisson mean is completely determined by the number of
items counted in total. Table 2.1 gives the resulting 95% and 99% confidence
limits, which can also be calculated in program-group EXTRAS (Appendix 2). For
Decide what level of precision you require. Do you want your estimate of the
mean to be accurate within +10% of the true population mean? Within +1% of the
true mean? You must decide what the desired error limits will be for your sample.
Charles J. Krebs, CHARLES L. KREBS, Professor of Zoology Charles J Krebs.
where x = Population mean x = Observed value of x in sample i n = Sample size
For the variance of the measurements, we have the usual formula:* — `Y2 ...