STATISTICS

STATISTICS

1. data

   • Nominal
     • frequencies of different categories
   • Ordinal
     • ordered, but not always equally
   • Interval / Ratio
     • definite, ordered equally

2. How to choose a test

   • 3. Level of measurement
     • see data, pick one
   • 1. Difference or correlation
   • 2. Experimental design
   • 3. Levels of measurement
   • • Parametric tests
       • 1. Interval
       • 2. Normal distribution
       • 3. Homogeny of variants
         • - results in every condition must be similarly distributed or spread - comparing standard distributions helps to ddetermine this

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