highly significantp < 10 − 8
Moreover, the correlation between ensemble mean forecasts of SST EEIO and their error is highly significant (r = 0.77, p < 10 − 8 ), i.e. small real multi-annual variations in the state of the IOD are vastly exaggerated by the hindcasts and indicate state-dependence of SEAS5 forecast errors in the EEIO.