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People often refer to alpha and betha in statistics ( respectively the probability of making a type I and a type II error ) as "rates" or "error rates".

Is it right? I know that rates is usually referred to past, meanwhile a probability is referred to future events.

Can someone make this clear?

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  • $\begingroup$ In frequentist statistics propability is not a plausibility of event, but it's relative frequency in infinity number of repetition. $\endgroup$ Commented Nov 25, 2016 at 7:42
  • $\begingroup$ The standard definitions of frequency and probability have nothing to do with time. $\endgroup$
    – whuber
    Commented Nov 25, 2016 at 17:34
  • $\begingroup$ Yes error rate is commonly used for error probabilities. Bill Huber's comment is correct. $\endgroup$ Commented Nov 26, 2016 at 11:33

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