95% of confidence limit exist between –
Correct Answer: +-2 S.D.
Description: Ans. is 'b' i.e., +- 2 SD 1 SD --> Coveres 68% of area (68% confidence limit) 2 SD --4 Coveres 95% of area (95% confidence limit) 3 SD --> Coveres 99.7% of area (99.7% confidence limit)
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