<prompt> In a Standard detion of 2, confidence limit is68.3095.4099.7076.20  <response>: Normal Curve This is a normal distribution curve in which 95 of the population falls between -2SD and 2SD. Confidence limits are the upper and lower boundaries of a confidence interval. Confidence interval is the interval within which a parameter value is expected to lie with ceain confidence levels, as could be revealed by repeated samples. 