This statement right here, we can switch this with p. The probability that p is within two standard deviations of the sampling distribution of x is 95.4%. Now, we don't know what this number right here is, but we have estimated it. Remember, our best estimate of this is the true standard, or it is the true standard deviation of the population divided by 10. We can estimate the true standard deviation of the population with our sampling standard deviation, which was 0.5, 0.5 divided by 10. Our best estimate of the standard deviation of the sampling distribution of the sample mean is 0.05. Now, we can say, and I'll switch colors, the probability that the parameter p, the proportion of the population saying one, is within two times, remember, our best estimate of this right here is 0.05, of a sample mean that we take is equal to 95.4%. And so, we could say the probability that p is within two times 0.05 is going to be equal to, 2.0 is going to be 0.10, of our mean is equal to 95.