Find Standard Deviation from Given mean

Hey,
Can we find Standard deviation of a distribution if we have the mean of the distribution?

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Of course not. You'd need the distribution itself, or at least some samples from the distribution.
What if it is a Uniform Distribution or Lognormal distribution?
No, neither of those distributions. It is only possible for a few special 1-parameter distributions like the exponential and the Poisson. (Maybe only those two--I don't know of another.)

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2021-8-20

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