On true value and uncertainty of a physical quantity

Abstract

In this paper, we consider the problem of quantitative estimation in the interval statement of: a) uncertainty of the results of indirect observations; b) true value of a physical quantity. It is known, that in the case of indirect measurements with more than two input parameters, statistical processing of observation results in a probabilistic statement is possible only by statistical modeling. Estimation of the uncertainty value of the result of indirect measurements is performed in an interval statement using the example of the simplest three-parameter problem. It is shown that the idea of representing the true value of a physical quantity using an interval number to be promising. Measurement models are described for two types of physical quantity: the rod length and the weight of the load, and quantitative estimates of the width of the intervals of their true values are performed