對稱概率分佈(symmetric probability distribution)係概率分佈一種。一個對稱概率分佈定義上係指符合下面呢條式嘅概率分佈,當中 係個分佈上嘅一點[1]:
- 所有實數
對稱度(symmetry)係指一個概率分佈可以有嘅一個屬性,攞個概率分佈當中嘅一個 值,個分佈喺 左邊嗰部份同個分佈喺 右邊嗰部份形狀上愈相似,個概率分佈以 為中心嘅對稱度就愈高;喺實際應用上,量度一個概率分佈嘅對稱度嗰陣會用嘅 值通常會係個分佈嘅平均值[1]。
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