If you are asking what a Confidence Interval is, here is the answer (your question isn't very clear). There are no absolute values in statistics. Instead, think in terms of the probability that a value is a certain number. For example, if we give an IQ test and get a score of 110, the person's IQ is actually about 110. If we know the 95% Confidence Interval is 3, we can say the person's IQ is 110 +/- 3 with 95% certainty.