Z0.975=1.96 What does the "0.975" represent? What does the "1.96" represent? 0.975 represents a z-score; 1.96 represents the probability. 0.975 represents a probability; 1.96 represents the z- score. 0.975 represents the probability of a Type 2 Error: 1.96 represents the probability of a Type 1 Error. 0.975 represents the probability of a Type 1 Error: 1.96 represents the probability of a Type 2 Error..