Suppose all 1500 coins are fair About how many students will conclude that

Suppose all 1500 coins are fair about how many

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Suppose all 1500 coins are fair.About how many students will conclude that their coins are unfair?
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Statistic Simulated Under the NullAbout 5% of the area is to the right of the gold line
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An Error ProbabilityThe cutoff for the P-value is an error probability.If:your cutoff is 5%and the null hypothesis happens to be truethen there is about a 5% chancethat your test will reject the null hypothesis.
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Origin of the Conventions
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Sir Ronald Fisher, 1890-1962
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“It is convenient to take this point [5%] as a limit in judging whether a deviation is to be considered significant or not.”–– Statistical Methods for Research WorkersSir Ronald Fisher, 1925
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“If one in twenty does not seem high enough odds, we may, if we prefer it, draw the line at one in fifty (the 2 percent point), or one in a hundred (the 1 percent point). Personally, the author prefers to set a low standard of significance at the 5 percent point …”Sir Ronald Fisher, 1926
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A/B Testing
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Comparing Two SamplesCompare values of sampled individuals in Group A with values of sampled individuals in Group B.Question: Do the two sets of values come from the same underlying distribution?Answering this question by performing a statistical test is called A/B testing.
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  • Fall '17
  • Statistics, Null hypothesis, Statistical hypothesis testing, Statistical significance, Ronald Fisher, Sir Ronald Fisher

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