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# Two populations parameters, Test Statistics

You can read more and more about this subject to cover it all, I took this helpful diagram from( Biostatistics, Basic Concepts and Methodology for the Health Sciences, Wayne W. Daniel, page 183, FIGURE 6.4.1)
by

## Mona Alfarsi

on 13 May 2013

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#### Transcript of Two populations parameters, Test Statistics

You are a statistician You have tow populations And You want to test the differnce between tow population parameters Don't Worry! just follow the diagram and you will find the suitable distribution Now.. you are CONFUSED !!! Z t t' or You know some formulas for comparing between two population means Z t t' Non-parametric!! Wilcoxon Sign test Kolmogorov–Smirnov test Mann–Whitney U Non-parametric tests ? ! ! ! ! ! That was so helpful !
Thank you Prof. Alfarsi
Thank you Taibah University. Your welcome :)

Hope you enjoy..

Now.. your turn to play with formulas :) Tow populations are not normally distributed Tow populations are normally distributed Are tow population size large? No Yes Are tow population variances are known? Are tow population size large? Now .. you have free clicking
click above the arrows not on it!
and take your direction . Are tow population variances are equal? Yes No Yes Z t t' or Z Z or No No Are tow population variances are known? Yes Z Are tow population variances are equal? No Yes t t' Are tow population size large? Yes No No Are tow population variances are known? Yes Z Are tow population variances are equal? No Yes t' Z Non-parametric tests
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