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1. Oxford American Dictionary

   standard deviation

   • IPA[ˈstandərd ˌdēvēˈāSHən]

   美式

   • n.
     a quantity calculated to indicate the extent of deviation for a group as a whole.

   • noun: standard deviation, plural noun: standard deviations

2. • 更多解釋

   standard deviation

   英式

   • n.
     a quantity expressing by how much the members of a group differ from the mean value for the group.

   Oxford Dictionary