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The p -value is the probability under the null hypothesis of obtaining a real-valued test statistic at least as extreme as the one obtained. Consider an observed test-statistic from unknown distribution .
16 lip 2020 · The p value, or probability value, tells you how likely it is that your data could have occurred under the null hypothesis. It does this by calculating the likelihood of your test statistic, which is the number calculated by a statistical test using your data.
According to American Statistical Association, “a p-value is the probability under a specified statistical model that a statistical summary of the data (e.g., the sample mean difference between two compared groups) would be equal to or more extreme than its observed value.”
Wartość p, p-wartość, prawdopodobieństwo testowe (ang. p-value, probability value) – prawdopodobieństwo uzyskania wyników testu co najmniej tak samo skrajnych, jak te zaobserwowane w rzeczywistości (w próbie losowej z populacji), obliczone przy założeniu, że hipoteza zerowa jest prawdziwa.
9 kwi 2019 · A p-value is the probability of observing a sample statistic that is at least as extreme as your sample statistic, given that the null hypothesis is true. For example, suppose a factory claims that they produce tires that have a mean weight of 200 pounds.
9 gru 2020 · p-value definition and meaning. The technical definition of the p-value is (based on [4,5,6]): A p-value is the probability of the data-generating mechanism corresponding to a specified null hypothesis to produce an outcome as extreme or more extreme than the one observed.
25 wrz 2024 · A p-value is a statistical measurement used to validate a hypothesis against observed data. A p-value measures the probability of obtaining the observed results, assuming that...
