Spread dispersion variability range interquartile range IQR Q

분산도(Spread, dispersion, variability) • 범위(range) • 사분위수범위(interquartile range: IQR) – Q 1, Q 2, Q 3 – IQR = Q 3 -Q 1 • 상자그림(Box-Whisker Plot: 간단하게 Box plot) – Min, Q 1, Q 2(median), Q 3, Max • 분산(Variance)와 표준편차(Standard Deviation) – 모집단(Population) – 표본(Sample)