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1 2023

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Standard deviation in the simulation of statistical measurements

Przystupa Krzysztof, Kolodiy Zenoviy, Yatsyshyn Svyatoslav, Majewski Jacek, Khoma Yuriy, Petrovska Iryna, Lasarenko Serhiy, Hut Taras

Metrology and Measurement Systems

2023

Vol. 30, nr 1

17--30

Is this article simulation of statistical measurements is performed on the basis of which the analysis of the standard deviation of the obtained results is carried out. It is shown that the standard deviation is minimum and independent from measurement duration while an object is in the state of equilibrium. For objects in a stationary non-equilibrium state the standard deviation depends on the duration measurements and the parameters of the state. The influence of these factors on the standard deviation is assessed with equation which includes the relaxation time. The value of the relaxation time is determined by approximating the energy spectrum of the studied signals. The analysis of energy spectra showed that the spectrum of white noise is inherent in objects in equilibrium; the flicker component of the spectrum occurs when the state of the object deviates from equilibrium.