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16 Experimental management In practical terms, there are two different modes of wildlife management: that in which management de ...
1 The provision of nest boxes for wood ducks will increase the size of the population. 2 The provision of nest boxes for waterfo ...
the equator towards the pole? That question is most easily tested statistically if we frame it in negative form, the so-called n ...
committing a Type 2 error is not immediately specifiable except that we can say that it is related inversely to the significance ...
A management treatment may be successful or it may be a failure. If the first, the manager needs to know whether the success flo ...
4 The effect of such local and extraneous influences on the results of the experi- ment is countered by replication. Suppose six ...
strong test of the effect of the treatments themselves is possible unless those treat- ments are replicated. Replicates are not ...
done to the control, other than for the manipulation that is formally the focus of the treatment. If vehicles are driven over th ...
wheat has no effect on the density (or rate of increase) of quail. What is tested, how- ever, is the statistical null hypothesis ...
Hypothetically, additional salt in the diet of quail might affect their physiology and hence their dynamics, particularly in sod ...
Very often a field experiment breaches one or more rules of experimental design and so no longer answers unambiguously the quest ...
of the experiment. There results a set of data in which the individual effects of sheep on vegetation cannot be disentangled fro ...
The one-factor ANOVAtests the hypothesis that the response variable does not vary with the level of the factor. The alternative ...
progressed? The null hypothesis is that the average seen per transect per day is inde- pendent of the day order. Note that facto ...
282 Chapter 16 Day 1 Day 2 Day 3 Ti Red kangaroos 45 19 18 17 51 44 8861 28 11 35 26 72 65 48 34 76 53 67 52 ___^62 ___^27 ___^3 ...
are kept separate for purposes of analysis. Red kangaroos and eastern gray kanga- roos are now the two levels of the factor SPEC ...
The most common test for heterogeneity of variance is Bartlett’s. It can be found in almost all statistical texts. Recent work h ...
In many biological cases the variance of the response variable rises with the mean. That is particularly true of counts of anima ...
The three-factor ANOVAfollows the general lines of the two-factor except that seven rather than three questions are now being ad ...
changed between 1987 and 1988. We do not wish to test the more general question of whether kangaroo populations remain stable wi ...
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