A common problem is that of describing the Probability distribution of a single, Continuous variable.
During the 20th century this proc.
But about a century ago the great statistician, Karl Pearson, realized that the known Probability Distributions were not sufficient to handle all of the phenomena then under investigation, and set out to create new Distributions with useful properties.
A few distributions, such as the normal and exponential, were discovered in the 1800\'s or earlier.
A common problem is that of describing the Probability distribution of a single, Continuous variable