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11 August, 11:10

How many standard deviations from the mean is considered unusual? Why?

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  1. 11 August, 11:17
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    It depends on how the data are distributed.

    Step-by-step explanation:

    If the data follow a normal (Gaussian) distribution, which is the most common, then 2 deviations from the mean is considered unusual because less than 4.55% of the data are in this situation.
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