I am designing a statistical FAQ site for non-statisticians and would be grateful if anyone could point me to good web-based resources or resources which I could make available online which covers the Friedman test by any of the following means:
a) a website, pdf or PowerPoint presentation which clearly demonstrates how to perform the test using SPSS and thus does not simply provide a string of commands
b) a website, pdf or PowerPoint presentation which provides a lucid explanation of the motivation and associated theory in using the Friedman test.
If such resources are unavailable, I shall try to find some time to design a suitable resource myself but obviously it would be good not to have to reinvent the wheel.
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