• Laerd is a great statistics help website, it has some very useful free pages. To get to these search for the test you're interested in and the word 'Laerd' via a search engine, the first hit(s) should be of interest to you.
When evaluating websites use the following checklist to assess the reliability of the information:
(Who is the author and what authority do they possess?)
(Are any claims supported by reliable evidence?)
(Is the information biased?)
(Is the information up-to-date?)
(Who is the site aimed at?)
(Are links from the site working and pointing to other reliable sites?)