DESCRIPTION OF SIGNAL FLUCTUATIONS DURING MEASUREMENTS

We show that a Pearson distribution of the second kind provides a good description of signal scattering in production quality-control, the d istribution of radiation intensity in collimated beams, etc. We presen t formular; for the moments of one-dimensional, two-dimensional, and c onditional distributions. We present graphs for densities and distribu tion functions. An approach to increasing measurement accuracy is desc ribed.