PhyStat-v Workshop on Statistical Issues in Experimental Neutrino Physics

The ORCA detector is the low-energy branch of the new generation neutrino telescope KM3NeT which is currently being constructed in the Mediterranean Sea. Interactions of neutrinos that are created in cosmic ray interactions travel and through the Earth can be observed in the detector. By measuring the matter-induced oscillation effects on this flux, KM3NeT/ORCA aims at settling the question on the neutrino mass ordering and to constrain other oscillation parameters. In this contribution an introduction to the ORCA detector will be given, together with the Monte-Carlo simulation efforts and statistical methods used to estimate the sensitivity to determine whether the neutrino mass hierarchy is normal or inverted.