The probability density function measures continuous variables. Having said that, it's important to note that stock and investment returns are generally not continuous random variables.
A random variable X is a quantity that can take on values randomly according to a probability ( X ? x), where x is a selected value. The probability (X ?x) gives a scalar value on the interval [0,1] ...
Bayes' theorem. Repeated trials. Continuous and discrete random variables and their probability distribution and density functions. Functions of random variables and their distribution and density ...