ABSTRACT
The most commonly used probability distribution is the normal distribution. The history of normal distribution goes way back to 1700s. Abraham DeMoivre, a French-born mathematician introduced the normal distribution in 1733. Another French astronomer and mathematician, Pierre-Simon Laplace dealt with normal distribution in 1778, when he derived ‘central limit theorem’. In 1809 Johann Carl Friedrich Gauss (1777-1855), a German physicist and mathematician, studied normal distribution extensively and used it for analysing astronomical data. Normal distribution curve is also called as Gaussian distribution after Johann Carl Friedrich Gauss, who recognized that the errors of repeated measurements of an object are normally distributed (Black, 2009).
