In Statistics, the normal distribution (Gaussian distribution, 정규분포) is a very common continuous Probability distribution. (https://en.wikipedia.org/wiki/Normal_distribution)
$$ f(x \; | \; \mu, \sigma^2) = \frac{1}{\sigma\sqrt{2\pi} } \; e^{ -\frac{(x-\mu)^2}{2\sigma^2} }$$
정규분포인지 검정하는 방법이 Shapiro-Wilk test임.
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