[@res_CE]). For chemical freeze-out at low collision energies (small temperature $T$ and large baryonic chemical potential $\mu_B$) most charged particles are protons. Fermi statistics then lead to a suppression of positively charged and all charged particle number fluctuations, $\omega_+\cong\omega_{ch}=0.98\div 1$. At high collision energies (large $T$ and small $\mu_B$) most charged particles are pions. Thus, Bose statistics dominates and leads to the enhancement of particle number fluctuations, $\omega_{\pm}\cong
\omega_{ch}=1.05\div 1.06$. These numbers demonstrate that the effects of quantum statistics are small at the chemical freeze-out.

Resonance decay in the GCE and CE lead to the enhancement of particle number fluctuations. At high collision energies (the largest SPS energy and above) the GCE calculations give the following final (after resonance decay) values, $\omega_{\pm}\cong 1.1$ and $\omega_{ch}\cong 1.6$  [@res_CE].

There is a qualitative difference in the properties of the mean multiplicity and the scaled variance of multiplicity distribution in statistical models. In the case of the mean multiplicity results obtained with the GCE, canonical ensemble (CE), and micro-canonical ensemble (MCE) approach each other in the large volume limit (this reflects the thermodynamical equivalence of statistical ensembles). It was recently found [@CE; @res_CE; @res_MCE] that corresponding results for the scaled variance are different 