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)
혹은 percentage로는
round(100* (pnorm(1) - pnorm(-1)))
round(100* (pnorm(2) - pnorm(-2))) round(100* (pnorm(1.96) - pnorm(-1.96)))
in R, qnorm(percentage)
qnorm(.025) qnorm(.975)
z_score.1537225734.txt.gz · Last modified: 2018/09/18 08:08 by hkimscil