The standard deviation here is 1. If we're looking within 2 standard deviations, that whole area right there, by the empirical rule, is 95% within 2 standard deviations. This is 95%. Which tells us that everything else combined. So if you take this yellow portion right here, and this yellow portion right here. So everything beyond 2 standard deviations in either direction, that has to be the remainder. So everything in the middle was 95 within 2 standard deviations.