In a Standard detion of 2, confidence limit is: (A) 68.30%, (B) 95.40%, (C) 99.70%, (D) 76.20%
Answer is B. 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.