why are world cup predictions testable how often would brazil win a world cup are the world cup predictions testable how many matches does nate silver predict can prediction model be used to test how many times does the world cup prediction predict can predictability be tested can a prediction model be tested can you test a predictive model how can we test the power of predictive models how to test predicting world cup which model is a good predictor of the world cup is a world cup prediction valid what is the average chance of brazil winning the world cup are world cup predictions testable what is the world cup predictions can the world cup prediction be tested what is the likelihood of brazil winning the world cup how many times do soccer predictions get accurate are soccer world cup predictions testable