Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and here for more.

Log-Normal Distribution

Graphic Representation
Log-Normal Distribution
Applications The log-normal distribution is a distribution which occurs if the exponential function is applied to normally distributed data (example y = ex: if x is normally distributed, then y is log-normally distributed). Many distributions occurring in nature are not symmetric and can be approximated using the log-normal distribution. 
Variance LogNorm Second Mode