Models of bounded random variables in problems of identification of handwriting keyboard

A universal model for the approximation of laws of distributions bounded random variables used in the study to describe the timing of keyboard handwriting is proposed The article describes the elements of handwriting keyboard (pressing duration, time between keystrokes, time between releasing and pressing the next key, etc.), which are random variables. Since these values are limited, their approximation by beta distributions are justifi ed. The peculiarity of this distribution is that it describes the continuous random variables in a limited range.