Review:
There is a familiar cry that goes up from many students when
the idea of statistics is mentioned. The need for such work
is not denied but the issue seems to be how we can get students
(or staff) to recognise the importance of statistical literacy
with minimum effort and maximum effect. This text aims to do
both using the devise of the title to lure readers. If not terrified
at least confused and so we are looking for a text that understands
the requirements of the beginner whilst still being true to
key principles.
The
text works by gradually building upon a few simple ideas. It
starts with few basic assumptions and then shows how, by adding
layers of complexity, statistics can be properly used and interpreted.
We start with a brief run through of the books components where
icons help highlight key ideas. An extremely brief introduction
outlining the nature of statistics leads us into the first idea
- that of variation. There are a limited number of categories
in statistics and this is one of the most fundamental means,
standard deviation and variance. Chapter four starts to look
at ideas in more detail adding a quicker way around basic calculations
and demonstrating how it works. The next move is to the normal
distribution, described in chapter five and expanded upon in
the next two chapters. Chapter 8 moves to the t-test - a more
common way of testing variation. At this stage in the text the
reader is moving towards more complex (and statistically useful)
calculations and so the earlier ideas are assumed rather than
fleshed out as happened before. Chapter 9 looks at the need
for careful examination of the probabilities of extreme measures
- usually referred to as one or two tailed tests. It highlights
the care that must be taken when comparing results especially
if a small error can lead to the rejection (or not) or an hypothesis.
Following this the reader moves to chapters describing the uses
of and calculations for analyses of variance. Another level
of complexity is added when factorial experiments are discussed.
These are studies where two or more variables are studied concurrently
leading to the need to separate out which changes, if any, are
related to which combination of factors. The importance of these
tests are shown by the fact that four chapters are devoted to
it. Starting with an overview of the technique, we move to 2
and multi-factor tests and then to split plot variations. Chapter
16 returns to t-test and variance but this times considers some
of the more subtle variations needed to distinguish between
differences in many means. Given that the general movement is
towards more complex testing, chapters 17 and 18 might seem
out of place. The former gives a robust account of correlation
noting how and when it is appropriate. The latter is the familiar
chi-squared test comparing "observed" with "expected"
results. Finally there is a discussion of non-parametric tests
with some examples to guide the reader.
This
is an interesting way to cover statistical methods. The title
conveys the idea that it will calm the nerves. Certainly there
is every attempt to reduce problems e.g. summaries, memory devices
and lots of examples but most of these suggest the need for
more calculations. This is not a text stating simply which test
can be used, when. It's more of an exploration of both how and
why certain statistical tests work (or don't) and what issues
are involved as well as giving the test details. In this way
it seems to fall between two stools lacking the simple approach
of test finding whilst giving less detail for more complete
statistical exploration. A useful text for statically education
but one that may well best be used in conjunction with other
approaches.