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What is Mean + 1.96 SD include following % of values in a distribution: September 2012 and explain in detail?
Ans: D i.e. 95% 96 is the approximate value of the 97.5 percentile point of the normal distribution used in probability and statistics. 95% of the area under a normal curve lies within roughly 1.96 standard detions of the mean, and due to the central limit theorem, this number is therefore used in the construction of approximate 95% confidence intervals.