In the model of low-energy quantum gravity by the author, the
ratio ${H(z) / (1+z)}$ should be equal to the Hubble constant.
Here, the weighted average value of the Hubble constant has been
found using 29 observed values of the Hubble parameter $H(z)$:
$\pm \sigma_{0}=(64.40 \pm 5.95) \ km \ s^{-1} \ Mpc^{-1}.
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