Ecological MethodologyThis 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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... Variance ( N1 ) = where Ñ } [ variance ( p , ) ] + Ñ1⁄2 [ variance ( §2 ) ] ( 3.2 ) - ( §1 − §2 ) 2 P1 ( 1 - p1 ) Variance ( p1 ) = ( 3.3 ) nj P2 ( 1 - P2 ) Variance ( p2 ) = ( 3.4 ) n2 where n1 = Total sample size used to estimate the ...
... variance of the stratified means depends only on the size of the variances within each stratum . If you could divide a highly variable population into homogeneous strata such that all measure- ments within a stratum were equal , the ...
... [ variance ( mean 1.60 ) ] . ( Data from Iwao 1975. ) = 1.46 Taylor's Power Law Taylor ( 1961 ) observed that many quadrat counts for insects could be summarized relatively simply because the variance of the counts was related to the mean ...