Biostatistics Made Easy:
A Guide for U.S. Air Force Public Health Professionals

 Contents

 1.     Data display and summary  

 2.     Mean and standard deviation 

 3.     Populations and samples 

 4.     Statements of probability and confidence intervals 

 5.     Differences between means: type I and type II errors and power  

 6.     Differences between percentages and paired alternatives  

 7.     The t-tests  

 8.     The chi-squared tests

 9.     Exact probability test  

 10.   Rank score tests  

 11.   Correlation and regression

 12.   Survival analysis 

 13.   Study design and choosing a statistical test  

Appendix A - Probabilities related to multiples of standard deviations for a Normal distribution

Appendix B - Distribution of t (two tailed)

Appendix C - Distribution of µ 

Appendix D - Wilcoxon test on paired samples: 1% levels of P

Appendix E - Mann-Whitney test on unpaired samples: 5% and 1% levels of P  

Appendix F - Random Numbers

Glossary of Statistical Terms 

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Adapted and Modified from: T.D.V. Swinscow, Statistics at Square One, 9th Edition, Revised by M.J. Campbell, University of Southampton, UK