It relates to probability density functions by explaining how the distribution of these averages or sums tends to approach a specific shape: the normal distribution (bell curve).

The formula for this distribution’s probability density function is shown below. Note that the only variable parameters are the mean and standard deviation.

Discover what a log-normal distribution is, its financial applications, and how to calculate it, including using Excel for ...

6.2 The Normal Distribution (pp. 220-231) You are not required to memorize the formula for the normal probability density function, but rather know the properties (symmetry and bell shape).

Application of Weibull distribution in a generalized way to estimate wind potential cannot always be advisable. The novelty of this work is to estimate wind potential using Normal probability density ...

We propose a method for reconstructing a probability density function (pdf) from a sample of an n-dimensional probability distribution. The method works by iteratively applying some simple ...

Stefano Mazzuco, Bruno Scarpa, Fitting age-specific fertility rates by a flexible generalized skew normal probability density function, Journal of the Royal Statistical Society.