Dispersi statistik: Béda antarrépisi
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Baris ka-1:
Ukuran '''dispersi statistik''' kudu ngahasilkeun angka nol lamun sakabeh data identik, sarta kudu naek lamun data leuwih bareda. Ukuran dispersi pangpentingna nyaeta [[simpangan baku]], akar kuadrat [[varian]].
A measure of statistical dispersion is particularly useful if it is location invariant, and linear in scale. So if a random variable ''X'' has a dispersion of ''S<sub>X</sub>'' then a [[linear transformation]] ''Y'' = ''aX'' + ''b'' for [[real number|real]] ''a'' and ''b'' should have dispersion ''S<sub>Y</sub>'' = ''aS<sub>X</sub>''.
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