And really that's all that matters because we have this little funny language here called reasonably confident, and we have to estimate the standard deviation anyway. In fact, we could say if we want, I could say it's going to be exactly equal to 95.4%. But in general, two standard deviations, 95%, that's what people equate with each other. Now, this statement is the exact same thing as the probability that the sampling mean, or the mean of the sample, not the sample mean, the probability of the mean of the sampling distribution is within two standard deviations of the sampling distribution of x is also going to be the same number, is also going to be equal to 95.4%. These are the exact same statement. If x is within two standard deviations of this, then this, then the mean is within two standard deviations of x. These are just two ways of phrasing the same thing.