Alpha (α)

In statistics, alpha (α), or alpha level, is the probability value (p-value) used to decide whether to accept or reject a null hypothesis. The critical value of .05 is the generally accepted alpha level. 

The alpha level is the P-value that we as researchers decide to accept before we will be confident enough to release a finding. This is our predetermined acceptance level. 

Alpha (α) is the first letter of the Greek alphabet. 

AKA: Critical value, cut-off value

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