Maths and Statistics Help (MASH) at the University of Sheffield has an excellent guide on deciding which statistical test to use
For online help with a wide selection of statistics topics take a look at the resources on StatsTutor
The Khan Academy offers a selection of video tutorials on probability and statistical topics.
Topics covered include:
StatsTutor has a short video tutorial demonstrating how to test the normality of data using SPSS
See our reading list for further resources related to statistics available from the Library