Do we wanna go 1.96 standard errors above and below our sample proportion, or do we wanna go 2.576 standard errors above and below our sample proportion? And the key is the 99% confidence level. Now, if we have a 99% confidence level, one way to think about it is, so let me just do my best shot at drawing a normal distribution here. And so if you want a 99% confidence level, that means you wanna contain the 99%, the middle 99% under the curve right over here, that area. And so if this is 99%, then this right over here is going to be 0.5%, and this right over here is 0.5%. We want the z value that's going to leave 0.5% above it. And so that's actually going to be 99.5% is what we wanna look up on the table.