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      Question

      In a normally distributed population, number of

      observation faling within the range Mean ± S.D. is approximately __________%
      A 10 Correct Answer Incorrect Answer
      B 32 Correct Answer Incorrect Answer
      C 68 Correct Answer Incorrect Answer
      D 95 Correct Answer Incorrect Answer

      Solution

      In a normal distribution, approximately 68% of observations fall within one standard deviation of the mean, reflecting the central tendency of the data distribution.

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