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

Statistical uncertainties of the $v_{n}\{2k\}$ harmonics from Q-cumulants