Model Comparison tests of modified gravity from the E\"ot-Wash
  experiment
  Perivolaropoulos et al (arXiv:1904.09462) (P19) have argued that the residual
torque data in the E\"ot-Wash experiment is consistent with an oscillating
signal. This could either be a signature of non-local modified gravity theories
or some other systematic error in the data. We independently assess the
viability of such an oscillating signal in the same data using Bayesian and
information theoretical criterion, to complement the frequentist analysis in
P19. We fit this data to three different parametrizations (an offset Newtonian,
Yukawa, and an oscillating model), and assess the significance of the
oscillating model using AIC, BIC, WAIC, and Bayes factor. All these techniques
provide decisive evidence for the oscillating model compared to the Newtonian
model, provided the phase is fixed to the same value as in P19. If the phase is
allowed to vary, then significance from BIC, WAIC, and Bayes based tests
reduces to strong evidence, whereas only AIC still shows decisive evidence. Our
analysis codes have been made publicly available.
