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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... test and the chi - squared goodness - of - fit test . Index of Dispersion Test . We define an index of dispersion I to be I - Observed variance Observed mean $ 2 - x ( 4.3 ) For the theoretical Poisson distribution , the variance equals ...
... chi - square test of the index of dispersion ( 1 ) for a = 0.05 and for n < 101. Large values of x2 indicate an ... squared . In this case calculate the normal approximation to the chi- squared value : where 2 = z = √2x2 - √ ( 2v - 1 ) ...
Charles J. Krebs. Chi - Squared Goodness - of - Fit Test . To test the null hypothesis that the Poisson dis ... chi - squared table , X205 = 7.815 for 3 d.f. and the decision rule is to reject the null hypothesis if the observed chi ...