What percentage is one standard deviation?

Understand the Problem

The question is asking about the percentage of values that fall within one standard deviation from the mean in a normal distribution. In a standard normal distribution, approximately 68% of the data falls within one standard deviation of the mean.

Answer

68%

The final answer is 68%

Answer for screen readers

The final answer is 68%

More Information

According to the Empirical Rule (also known as the 68-95-99.7 rule), about 68% of the data in a normal distribution falls within one standard deviation from the mean.

Tips

A common mistake is confusing the percentage within one standard deviation (68%) with other standard deviations such as two (95%) or three (99.7%).

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