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連續同離散變數

連續變數英文continuous variable)同離散變數英文discrete variable)係統計學上嘅概念。一個連續變數嘅可能數值有無限咁多個,而離散變數得若干個可能數值。例:真相得兩個可能數值(真同假),但溫度嘅可能數值嘅數量原則上有無限咁多個,攝氏 100 度、攝氏 100.01 度、攝氏 100.0001 度... 等等。

轉換

[編輯]

中位數分割(median split)係將一個連續變數變做一個離散變數嘅一種方法;

  • 攞一個連續變數
  • 搵出 中位數
  • 數值 嘅個案冚唪唥設做「組 1」,而 數值 嘅個案冚唪唥設做「組 2」

-得出「屬組 1 定組 2」呢個離散變數,可以將一個原本係連續嘅變數做一啲離散變數先可以做嘅推論統計分析(例如係 ANOVA)。到咗 2020 年,中位數分割呢種做法廣受評擊,好多人都唔會接受呢種做法[1]

[編輯]
  1. Iacobucci, D., Posavac, S. S., Kardes, F. R., Schneider, M. J., & Popovich, D. L. (2015). The median split: Robust, refined, and revived. Journal of Consumer Psychology, 25(4), 690-704.


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連續同離散變數
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