In statistics, denoting the reliability of a finding or, conversely, the probability of the finding being the result of chance (generally less than 5%). [L. significo, to make known, signify, fr. signum, sign, + facio, to make]
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sig·nif·i·cant sig-'nif-i-kənt adj probably caused by something other than mere chance <a statistically \significant correlation between diet and disease>
sig·nif·i·cant·ly adv
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sig·nif·i·cant (sig-nifґĭ-kənt) in statistics, probably resulting from something other than chance.Medical dictionary. 2011.