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What are alpha and beta?

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βˆ™ 2007-04-30 11:01:20

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The first two letters in the Greek alphabet. In statistics the alpha level is the probability that you will wrongly reject the null hypothesis. This is also referred to as a false positive. The beta level is the probability that you will wrongly retain the null hypothesis (false negative). Software that is under development, unstable or still being tested is referred to as being 'in alpha' or 'in beta'. Alpha usually denotes a 'developer release' only. Software moves out of alpha into beta stage when it is ready for wider 'bug' (error) testing by the average user. Software deemed reliable and bug-free then moves out of beta into general release.

2007-04-30 11:01:20
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