Commonly Used Statistical Formulas:  Formulas.pdf

SPSS quick guide:  http://libraryonline.leedsmet.ac.uk/lco/publications/pdf/it/qg-24.pdf

SPSS 16 User Guide:  http://www.hanken.fi/student/media/3618/spssbaseusersguide160.pdf

Statistical Decision Trees:  http://ucspace.canberra.edu.au/display/7126/Inferential+statistics+decision-making+tree

Excel Statistics Tools (my creations, use at your own risk);

    Table_of_Z.xls
    Table_of_t.xls
    Pearson's r.xls
    Spearman's r.xls
    F_distribution.xls
    ChiSquare.xls

Gravetter, Wallnau Companion Site

Getting Started with SPSS

Z table - Normal Distribution

Student's t distribution calculator

Interactive Statitical Calculation Pages