We are confident that there is a 99% chance that P is within 0.08 of the sample mean of 0.568. What would be our confidence interval? It would be 0.568 plus or minus 0.08. What would that be? If you add 0.08 to this right over here, at the upper end, you're going to have 0.648, and at the lower end of our range, so this is the upper end, the lower end, if we subtract 8 from this, we get 0.488. We are 99% confident that the true population proportion is between these two numbers. Or another way, that the true percentage of teachers who think those computers are good ideas is between.