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.
Results 1-3 of 45
(a) Observed data I I I I I I T s 4 5 6 O 1 2 3 Number of earthworms per 0.25 m” (b)
Expected Poisson I- I I I I I I O 1 2 3 4 5 6 Number of earthworms per 0.25 m”
Figure 4.4 (a) Observed frequency distribution of the number of earthworms ...
The observed and expected frequency distributions in Figure 4.4 are fairly similar
, and we need a statistical technique to test the null hypothesis that the Poisson
distribution provides an adequate fit to the observed data. This statistical ...
The reliability of a Poisson mean is completely determined by the number of
items counted in total. Table 2.1 gives the ... As the mean of a theoretical Poisson
distribution gets larger, the asymmetry of the distribution disappears. Figure 4.6 ...