code: def get_mean_and_stddevs(self, sites, rup, dists, imt, stddev_types):
          
          mean = self._get_mean(imt, rup.mag, rup.hypo_depth, dists.rrup, d=0)
          stddevs = self._get_stddevs(stddev_types, dists.rrup)
          mean = self._apply_amplification_factor(mean, sites.vs30)
          return mean, stddevs
docs: Implements equation 3.5.1-1 page 148 for mean value and equation
          3.5.5-2 page 151 for total standard deviation.
  
          See :meth:`superclass method
          <.base.GroundShakingIntensityModel.get_mean_and_stddevs>`
          for spec of input and result values.