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In Normal distribution, what percentage of the sample is found within 2 standard deviation of the mean?
Suggested Answer: B
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In a normal distribution sample, within 1 standard deviation 68% of the sample falls within 1 standard deviation, 95% within 2 standard deviations, and 99.7% within 3 standard deviations of the mean.
http://www.bmj.com/about-bmj/resources-readers/publications/statistics-square-one
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