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Review:
Despite the importance of mathematics and statistics in ecology
it still remains one of the more difficult areas to teach. It's
hard to see why since most people who take advanced courses have
the ability to handle abstract concepts by definition. Perhaps
it's the way that we get into the subject. With this end in mind,
two texts have been juxtaposed in the review system giving this
reviewer a chance to see two very different approaches to the
topic.
In
this text (see here for the other),
the emphasis is on the analysis of methods and their application.
We start with a brief overview of maths and modelling in science.
Chapter two focusses on data from basic description and classification
through to chemical and physics equations. Chapter three looks
at equations and their solutions. Like the previous chapter this
is very much an introductory crash-course in mathematics, confirming
the author's stated intention of working at an beginner's level
to bring all up to speed. It's also a feature of the book that
the mathematics covers a very wide range of potential applications
from "pure" to "applied" sciences. Chapter
four moves on to the basic linear relationship and how that can
be analysed. Logarithmic and exponential functions are a key part
of ecological theory and a basic outline of these techniques makes
chapter five useful. This is allied to the next chapter which
is an outline of calculus and differentiation. From this point,
the work turns to statistics with an opening chapter looking at
basic notation, means, deviation, frequency and probability. From
this we move on to the various statistical techniques dealing
with distributions and errors. In a change, chapter 9 looks at
the scientific method and how maths and statistics can be used
to better refine the work. Having gained the data, the next stage
is analysis. Thus chapter 10 deals with those tests (e.g. f and
t tests) where the parameters are reasonably well known whilst
chapter 11 deals with comparisons of events such as the chi-squared
test. Chapter 12 continues the analysis only with non-parametric
tests ranging from Wilcoxon to Freidman. A final chapter starts
out by looking at experimental design but finishes by looking
at analysis of variance. Appendices have a range of test questions
and answers.
This
is an interesting text. It's almost the opposite of the other
one reviewed here and it too will have both supporters and those
preferring other methods. It's greatest difference is that it
has numerous worked examples. The text is limited compared to
the space given over to showing how a test can be achieved and
giving similar examples to work on. The rise of computer software
has meant that this text can plan its examples using spreadsheets
(as well as Minitab and SPSS). To help, there is a website
which has a range of information, examples, tutorials and updates
making this a very useful addition. Against this range of material
one must note that the text has a bias towards formulae and examples
which although essential, might deter the complete novice. For
those who have some basic idea of maths and who want an effective
way to refresh the memory or add basic skills this is a very good
text.
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