Statistical uncertainties of the vn{2k} harmonics from Q cumulants

Analytic formulas to calculate statistical uncertainties of $v_{n}\{2k\}$ harmonics extracted from the Q-cumulants are presented. The multivariate polynomial functions weighted means $2m$-particle azimuthal correlations, $\llangle 2m \rrangle$. Variances and covariances \rrangle$ included in analytic that can be calculated simultaneously with calculations harmonics. performed using a simple toy model which roughly simulates elliptic flow anisotropy magnitudes around 0.05. results compared obtained by many data sub-sets, bootstrapping method. first one is common way estimation real experiment. In order increase precision measurement harmonics, large number 15000 sub-sets same re-sampling bootstrap method used. A very good agreement comparison proposed calculation found. Additionally, recurrence equation for also