Question:
Percentage of scores between the mean and ± 1 standard deviation in a normal distribution is closest to:
Percentage of scores between the mean and ± 1 standard deviation in a normal distribution is closest to:
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The empirical rule (68-95-99.7) helps in understanding the spread of data in a normal distribution.
Updated On: Jan 24, 2025
- 68\%
- 34\%
- 95\%
- 99\%
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The Correct Option is A
Solution and Explanation
In a normal distribution, approximately 68\% of the data lies within one standard deviation (±1) from the mean.
- Approximately 95\% of the data lies within two standard deviations (±2) from the mean.
- Approximately 99\% of the data lies within three standard deviations (±3) from the mean.
Thus, the correct answer is (A) 68\%.
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