A Log-Normal distribution function is the normal distribution for the logarithm of the variable. In linear scale it is a highly skewed distribution with a long tail in the high productivity side.

Sankhyā: The Indian Journal of Statistics, Series B (2008-), Vol. 75, No. 1 (May 2013), pp. 1-15 (15 pages) Folded normal distribution arises when we try to find out the distribution of absolute ...

This video describes the central limit theorem and some properties of the normal distribution. Understanding this will help you tie together many of the different types of hypothesis tests and ...