\begin{document}$ H_0 $\end{document} along with two FRB-related parameters, yielding \begin{document}$H_0=60.99^{+4.57}_{-4.90}\ {\rm{km\; s^{-1}}\; Mpc^{-1}}$\end{document}. The best-fitting Hubble constant \begin{document}$ H_0 $\end{document} is smaller than the value obtained from the Cosmic Microwave Background (CMB), which may be caused by the small sample size of current FRB data. Monte Carlo simulations indicate that a set of 100 simulated FRBs provides a more precise fitting result for the Hubble constant. However, the precision of the Hubble constant does not improve when further enlarging the FRB sample. Additional simulations reveal a systematic deviation in the fitting results of \begin{document}$ H_0 $\end{document}, attributed to the quasi-Gaussian distribution of the dispersion measure in the intergalactic medium. Despite this, the results remain reliable within 1σ uncertainty, assuming that a sufficient number of FRB data points are available."> Possible bias of the constraints on the Hubble constant owing to the quasi-Gaussian distribution of DM<sub>IGM</sub> in fast radio bursts -
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