Qualitative Variation: Statistical Dispersion, Nominal Distribution, Information Entropy, Variation Ratio, Multinomial Distribution

Ratio distribution: Probability Distribution, Ratio, Random Variable, Cauchy Student's T F Chi...

Statistical Dispersion: Statistics, Variable, Probability Distribution, Standard Deviation, Interquartile Range, Central Tendency, Range

Slash Distribution: Probability Theory, Distribution, Random Variable, Statistically Independent , Ratio Distribution

On the phenomena of variation and geographical distribution as illustrated by Papilionid Malayan region