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Statistical Significance
Definition 1
In statistics, a number that expresses the probability that the result of a given experiment or study could have occurred purely by chance. This number can be a margin of error or it can indicate a confidence level. (NCI Thesaurus)
Definition 2
Describes a mathematical measure of difference between groups. The difference is said to be statistically significant if it is greater than what might be expected to happen by chance alone. (NCI Dictionary)
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