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Z-Score

· One min read

:a.k.a.: Standard Score

  • a way to compare two stats together
  • a z-score is not interpretable without context
  • equal to the number of standard deviations of difference between a data point and the mean

:::INFO see also

Formula​

$$
Z = \frac{x-\mu}{\sigma}
$$
  • $Z$ = standard score
  • $x$ = observed value
  • $\mu$ = mean of the sample
  • $\sigma$ = standard deviation of the sample