Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more. 
Home Basic Concepts Definition of basic terms Variability  
See also: Observations and Variables, Variance, Descriptive Statistics, Distributions  
VariabilityWhenever some measurements are taken, one has to deal with variability (or dispersion) in the data. As a matter of fact, virtually all natural processes vary  even those which yield "constant" results show up fluctuations if either the observation time is long enough or the scale of the measurement is zoomed in (see random experiment).
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Home Basic Concepts Definition of basic terms Variability 