Discovering statistics using SPSS : Andy Field
In this online textbook Andy Field attempts to answer the kind of questions he found asking himself while learning statistics and using SPSS as an undergraduate. Things like 'How can I understand how this statistical test works without knowing too much about the maths behind it?' Too many books tell the reader what to do and this can create the impression that statistics and SPSS are inflexible. SPSS has may options designed to allow you to tailor a given test to your particular needs.