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$\sim$ (tilde) means that a random variable is distributed according to a distribution.

but $\not\sim$ (not tilde) is valid to say that a random variable is not distributed according to a distribution?

e.g.: $X ≁ N(μ,σ^2)$

to say that X is not distributed according to a normal distribution?

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    $\begingroup$ Seems good enough to me. I am not aware of a standard alternative $\endgroup$ – Brevan Ellefsen Feb 21 at 9:22
  • $\begingroup$ So $X\sim N(\mu_1,\sigma^2)$ is not excluded ($\mu_1\ne \mu$)? $\endgroup$ – d.k.o. Feb 21 at 9:53
  • $\begingroup$ @d.k.o. it should means it isn't distributed like that. $\endgroup$ – Cirelli94 Feb 22 at 15:14

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