z_score
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평균이 0, 표준편차가 1인 정상분포에서의 개인점수를 말한다.
\begin{equation} \displaystyle z = \frac {X - \mu} {\sigma}} \end{equation}
in R, pnorm(zscore) or pnorm(sd)
pnorm(1) - pnorm(-1) pnorm(2) - pnorm(-2) pnorm(3) - pnorm(-3)
> pnorm(1) - pnorm(-1) [1] 0.6826895 > pnorm(2) - pnorm(-2) [1] 0.9544997 > pnorm(3) - pnorm(-3) [1] 0.9973002
in R, qnorm(percentage)
qnorm(.025) qnorm(.975)
qnorm(0.025) qnorm(0.975) qnorm(0.01) qnorm(0.99) qnorm(0.001) qnorm(0.999)
z_score.1569207387.txt.gz · Last modified: 2019/09/23 11:56 by hkimscil