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Definition of margin of error noun from the Oxford Advanced Learner's Dictionary

margin of error

noun
 
/ˌmɑːdʒɪn əv ˈerə(r)/
 
/ˌmɑːrdʒɪn əv ˈerər/
[usually singular]
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  1. an amount that you allow when you calculate something, for the possibility that a number is not completely accurate
    • The survey has a margin of error of 2.5 per cent.
See margin of error in the Oxford Advanced American Dictionary
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noun
 
 
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