"A probabilistic relation between the error estimates of physical quantities
obtained by different methods" Abubekerov M.K. and Gostev N.Yu. 
A distribution function for the ratio of the error estimates of physical quantities calculated using the confidence region method (based on the chisquare statistics) to the errors estimates calculated using the leastsquares method is obtained. If the analytical form of this function is used, then the most probable values of the error estimates calculated by the confidence region method can easily be obtained using only the error estimates calculated by the leastsquares method (without new observational data processing). Apart from a purely mathematical interest, this paper is of interest to experimenters involved in the processing of observational data, in particular, in the processing of astrophysical observations. Keywords: leastsquares method, statistics, confidence interval, chisquare, confidence region method, error estimates, processing of observational data.

