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Results tagged with variance
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user 39849
The expected squared deviation of a random variable from its mean; or, the average squared deviation of data about their mean.
7
votes
Deduce variance from boxplot
A naive approach:
In a Normal distribution, the 25% and 75% quantiles are located at $0.67\cdot\sigma$ distance from the center. That gives that the 50% centered density covers twice this distance ($ …
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