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Derivatives Compass

Normal distribution

Japanese
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Last reviewed
September 24, 2026

This is a draft, shown for review before publication.

The normal distribution is a probability distribution with a symmetric bell shape centered on its mean. Its shape is set by the mean and the standard deviation, and the probability of falling within one standard deviation of the mean is about 68.3%, rising to about 95.4% within two standard deviations.

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