  To probe this question, we perform a statistical analysis using the first
Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB)
catalog and identify a few discriminant properties between repeating and
non-repeating FRBs such as the repetition rate, duration, bandwidth, spectral
index, peak luminosity, and potential peak frequency. If repeating and
non-repeating FRBs belong to one population, their distribution distinctions
for the repetition rate and duration can be explained by the selection effect
due to the beamed emission as in Connor et al. (2020). However, we obtain that
the distribution distinctions for the spectral index and potentially the peak
frequency cannot be explained by the beamed emission within the framework of
either the coherent curvature radiation or synchrotron maser emission. This
indicates that there could be two populations. We further discuss three
possible scenarios for the required two populations.
