ABSTRACT
Check the syllabus that you are following to see whether knowledge of both parametric
and non-parametric tests is required.
Tests of statistical inference
In Section Nine there are details of descriptive statistics such as the mean, median, range,
and so on. As the name of such statistics implies, these only describe data. They do not
enable you to draw any firm conclusions as to the likelihood that your results are due to
chance, or whether the chance element is sufficiently low to enable you to reject your null
hypothesis. To be able to draw these kind of conclusions, you need to use what you
probably think of as ‘proper’ statistics (you may use a less polite word)—things with
strange names like Spearman’s rho and chi-square.
